2003 Cadillac Escalade EXT Fuel and Emissions Systems

Name: Sequential Multi-Port Fuel Injector Assembly
Brand: ACDelco
SKU: 217-1621
Price: 131.99 USD

Below you will find various in-demand Cadillac Fuel and Emissions Systems, components and accessories for your 2003 Escalade EXT. Advance Auto Parts has popular Escalade EXT parts like Gas Caps, Fuel Pumps, Fuel Injectors and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other Escalade EXT model years including 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 and more. Select a category of 2003 Cadillac Escalade EXT Fuel and Emissions Systems below and start saving instantly.

Popular 2003 Cadillac Escalade EXT Fuel and Emissions Systems Categories

Fuel Tank Cleaning Kits

Air Flow Meters and Mass Air

Gas Caps

Fuel Pumps

Oxygen Sensors

Vapor Canister Purge Valves

Vapor Canister Vent Solenoids

Fuel Injector Rails

MAP-Barometric Pressures

Vapor Canister Vent Valves

Secondary Air Injection Pipe Retainer

Manifold Air Pressure Sensors

Canister Purge Solenoids

Fuel Injectors

Vapor Canisters

Ambient Air Temperature Sensor Connectors

Fuel Tank Pressure Sensors

Fuel Injection Throttle Control Actuator Modules

Pressure Regulators

Ambient Air Temperature Sensors

Fuel Injector O-Ring Kits

Fuel Injector Seal Kits

Fuel Tank Straps

Fuel Tank Lock Rings

Fuel Tank Filler Necks

Secondary Air Injection Relays

Fuel Level Sensors

Fuel Injector Connectors

Mass Air Flow Sensor Connectors

Oxygen Sensor Connectors

Idle Air Control Valve Connectors

EGR Valve Gaskets

Fuel Injection Fuel Rail Stud

Vapor Canister Purge Valve Pipes

Secondary Air Injection Pump Connectors

Exhaust Gas Recirculation (EGR) Pipe Seals

Exhaust Gas Recirculation (EGR) Pipe Gaskets

Manifold Absolute Pressure Sensor Seals

Fuel Injection System

Fuel Cap Tester Adapters

Fuel Sender Connectors

Diverter Valve Connectors

Air Injection Bypass Valve Solenoid Connector

Fuel Injector and Insulator Retainer Kits

Fuel Injection Idle Speed Stabilizer Connectors

Essential Fuel and Emissions Systems for 2003 Cadillac Escalade EXTs

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$131.99

ACDelco GM Original Equipment Fuel Injectors are electro-magnetic valves that meter fuel into the engine’s intake manifold or cylinders for combustion, and are GM-recommended replacements for your vehicle’s original components. The engine control module (ECM) operates the injector by applying an electric current to the injector solenoid winding, causing the needle valve to open, and allowing pressurized fuel to be atomized into the intake airstream. These original equipment fuel injectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

This part requires programming andor special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Atomizes fuel into the engine’s intake manifold or cylinders, as part of the fuel and engine management system
Allows for a quick throttle response
Assists in cold engine starts
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$44.99

Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Product constructed to meet all design and operating characteristics as intended by the manufacturer.
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$63.99

The Premium CarQuest Vehicle Solutions line is designed for OE form, fit and function for both import and domestic vehicles. The A/C Pressure Relief Valve is used in the automotive air conditioning system to prevent unusual over-pressure that may cause damage to critical components within the system or to the system as a whole. By opening it’s valve when the system pressure exceeds the preset pressure levels and closing when the internal pressure decreases to the preset pressure levels, proper factory designated system pressures are maintained.

Product Features:

Made to OE spec to ensure a proper fit, form and function.
Sensors are engineered for precision performance, durability and a long service life.
All units are tested using advanced end-of-line testing equipment that pressurizes the A/C Pressure Relief Valve and checks functionality to ensure each A/C Pressure Relief Valve meets manufacturing specifications before packaging.

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$1.59

Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:

Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
Quality material – this retainer is made of durable material for long-lasting service
Versatile design – this retainer is suitable for a variety of automotive uses
Excellent value – this part offers original equipment quality at a competitive cost

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$16.99

ACDelco GM Original Equipment Ambient Air Temperature Sensors are used with automatic climate control systems. The sensors provide the HVAC system controller with outside air temperature, allowing the controller to modify the climate-control strategy. The sensors may also provide the signal for the outside temperature in the driver information display. This original equipment ambient air temperature sensor is a GM-recommended replacement for your vehicle’s original components and has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Repairs the outside temperature display function caused by failed ambient temp sensor
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$101.99

Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium fuel tank filler necks meet or exceed the performance of the original equipment they replace.

Product Features:

Unit is designed to OE fit, form and function requirements accomplished by leveraging our OE fuel system design expertise
Unit is dual coated for enhanced corrosion protection
Fit tested on the very same vehicle application for which it was developed verifying first-hand that the design fits properly and can be easily installed
Unit is leak tested after production to ensure product in free from fuel and / or evaporative leaks
Tested with OE fuel cap to prevent evaporative emission and check engine light failure

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$12.49

When replacing a fuel pump or module, it’s extremely important to clean the tank. Existing dirt, debris, and contamination stuck in the fuel tank can clog the brand-new strainer. Delphi’s Fuel Tank Cleaning Kit (FC01) and Tool (FC02) can help clean your fuel tank in less than five minutes. The FC01 includes a low-suds solution, cloth, and gloves that works together with the FC02 to help clean those hard to reach places without having to remove the fuel tank. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.

Product Features:

Helps avoid premature fuel pump failure
Lint free towel included
Low suds formulation
Removes harmful contaminants from the fuel tank

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$13.99

GM Genuine Parts Manifold Absolute Pressure Sensor Seals are designed, engineered, & tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$226.99

GM Genuine Parts Vapor Canisters are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These canisters capture and store evaporating fuel vapors from the fuel tank to be drawn into the intake manifold during engine operation. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Helps reduce harmful pollutants from entering the atmosphere
Captures fuel vapors to be re-burned in the engine
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$15.79

Driveworks offers a line of aftermarket parts and accessories that are commercially acceptable and competitively priced, which provides professional technicians and DIYers with an affordable alternative for repairs.

Product Features:

Direct-fit OE replacement ensures ease of installation
Designed to meet OE performance
As the leader in commercially acceptable parts, we provide professional technicians with the quality parts they need
As the leader in commercially acceptable parts, we provide professional technicians with the quality parts they need

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$165.99

The Fuel Level Sensor is a much more critical sensor that just reporting the fuel level in the fuel tank for the purpose of the fuel level gauge reading. The engine operating system and the vehicles emmissions control system requires this input to protect the engine should the fuel level be so low as to create a lean operating condition and possibly damage the engine. The other feature, and just as important, is the evaporative emmissions system operation. Fuel level must typically be between 15%-85% for the system to purge the fuel vapors.

Product Features:

Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
Robust circuit board design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.

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$37.49

ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle’s original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$311.99

Silver Bullet throttle body spacers create turbulence in the air flow at the point just prior entry into the engine increasing horsepower, torque and improving throttle response and fuel efficiency. Silver Bullet throttle body spacers are constructed out of durable T-6061 billet aluminum and using a unique serrated/helix entry to create turbulence at the manifold while eliminating the annoying whistle found in other helix only throttle spacers.

Product Features:

Reduces Throttle Response Time
Improves Acceleration
Easy To Install
Does Not Affect The Vehicles Electronic System

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$41.99

Product Features:

Enhances overall engine performance by providing proper vapor flow to maintain correct air-fuel mixture.
Helps reduce harmful emissions and ensures compliance with environmental regulations by controlling the release of fuel vapors into the engine
Ensures precise operation with electromagnetic principles to control the flow of fuel vapors from the carbon canister to the engine
Manufactured from high quality engineered materials, resistant to fuel vapors and extreme temperatures, ensuring long lasting performance
Meets or exceeds all OEM specifications

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$127.99

GM Genuine Parts Fuel Injector Rails are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$33.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Product constructed to meet all design and operating characteristics as intended by the manufacturer.
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$55.99

ACDelco GM Original Equipment Vapor Canister Vent Valves are GM-recommended replacements for your vehicle’s original components. These valves, when opened, allow air to pass in and out of the vapor canister vent. These original equipment vapor canister vent valves have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Controls fresh air flow to the canister
Sends fuel vapors to the engine for re-burn
Helps control fuel tank pressure
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$17.79

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

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$29.99

GM Genuine Parts Fuel Injector Seal Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These seals help provide liquid-tight connections between the fuel injector and related components. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Helps provide a seal to prevent fuel leaks
Helps seal combustion chamber from the elements
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$53.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$145.95

An ACDelco GM Original Equipment Fuel Injection Pressure Regulator is a GM-recommended replacement for your vehicle’s original component. The Fuel Injection Pressure Regulator is a mechanical valve that controls the fuel pressure in the fuel injector rail. The spring-loaded valve returns excess fuel back to the fuel tank. This original equipment fuel injection pressure regulator has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Fully tested against leaks
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$19.49

A recommended replacement whenever the sending unit is serviced, this fuel tank lock ring is a direct match for the original part. Designed for a secure fit, it’s manufactured from durable materials for reliable service.

Product Features:

Direct replacement – this fuel tank lock ring matches the fit, function and performance of the original part
Ideal solution – recommended for replacement whenever the sending unit is serviced to ensure a secure connection to the fuel tank
Durable construction – manufactured from quality materials for superior service and reliability
Trustworthy design – backed by a team of product designers and engineers with over 100 years of automotive aftermarket experience

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$19.99

Manufactured with OEM quality materials and safety standards by an OE Supplier. Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year.

Product Features:

Passes all state and federal emissions tests
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

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$71.99

Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium fuel tank straps meet or exceed the performance of the original equipment they replace.

Product Features:

Unit is designed to OE fit, form and function requirements accomplished by leveraging our expertise
Direct fit ensures safe, secure fuel tank installation
Product individually packaged and labeled to help reduce product damage prior to installation
Industry leading coverage on straps for plastic tanks

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$3.79

Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Validated for fit, form and function
Unsurpassed quality you can trust

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$86.99

CARDONE Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.

Product Features:

100% re-solder of critical components ensures superior electrical connections, no intermittent failures and longer product life.
On-car vehicle validation routines ensure that modules meet all form, fit, durability and performance requirements.
All modules are 100% tested with automated computer test equipment to ensure full functionality and reliability.
Our sensors precisely track O.E. output curves and maintain spec tolerances to ensure accurate feedback to the vehicle┐s engine control management system.
Components are rated to handle demanding temperature variations for optimum reliability in every environment.
As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80%.

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$29.99

GM Genuine Parts Vapor Canister Purge Valve Pipes are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

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$9.99

GM Genuine Parts Studs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

Upgrade your 2003 Cadillac Escalade EXT with Top-Quality Fuel and Emissions Systems

When it comes to maintaining or upgrading your 2003 Cadillac Escalade EXT, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Cadillac or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your Escalade EXT functioning at its best. At Advance Auto Parts, we offer a wide selection of 104 Fuel and Emissions Systems for the 2003 Cadillac Escalade EXT, designed to meet your needs without breaking the bank. From Gas Cap replacements to Fuel Pumps upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Fuel and Emissions Systems for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Fuel and Emissions Systems for your 2003 Cadillac Escalade EXT at great prices. Our Fuel and Emissions Systems inventory for this model ranges from just $1.59 to $2,866.99, with an average price of $111.30. Our 104 Fuel and Emissions Systems in stock come from 17 trusted brands, so you’re sure to find the right part for your 2003 Cadillac Escalade EXT without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2003 Cadillac Escalade EXT, we stock popular OEM and aftermarket Fuel and Emissions Systems from top names like FELPRO, GM Genuine, Carquest Premium, and more. FELPRO Fuel and Emissions Systems start at just $3.29 and boast an impressive 4.6 stars average rating from customers. GM Genuine and Carquest Premium also bring quality to the table, with Fuel and Emissions Systems available starting at $11.99, and at an average 4.5 stars rating. With 789 customer reviews and counting, our 2003 Cadillac Escalade EXT Fuel and Emissions Systems have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Fuel and Emissions System upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2003 Cadillac Escalade EXT is always ready to roll. We’re committed to providing you with everything you need to keep your Escalade EXT in top shape, all in one place. Start shopping confidently below for your 2003 Cadillac Escalade EXT!

Best-Selling Gas Caps for 2003 Cadillac Escalade EXTs

Enhance the driving experience in your Cadillac with 13 quality Gas Cap components, starting at $7.99.

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from

$11.99

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

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$14.99

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$15.49

Product Features:

Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$15.99

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$24.99

Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$16.99

Product Features:

Passes all state and federal emissions tests
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$23.99

Product Features:

Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$21.79

Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$22.99

Product Features:

Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$7.99

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

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$24.29

Come pre-assembled for quick and easy installation.
Several fastener options to work with any fuel cap compartment configuration
Fits vehicles orginally equipped with tether
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

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$11.79

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$10.99

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

Most Popular 2003 Cadillac Escalade EXT Fuel Pumps

Customize your Cadillac with 7 Fuel Pumps products like Fuel Pumps, Fuel Cap Tester Adapters, and Fuel Sender Connectors, all priced under $339.99.

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$297.99

Delphi is a Tier 1 supplier to the majority of global vehicle manufacturers and has been a manufacturer of dependable fuel pumps and fuel delivery parts for over 80 years. With over 30 OE-proprietary innovations and 150 patents in fuel technologies, Delphi is regarded as a market leader in North American fuel management with sales coverage at over 95%. Learn more about our expert-led training programs and tech hotline at 1-877-463-3574. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.

Product Features:

Delphi is a global OE manufacturer and all fuel pumps are built to Delphi’s OE standards
Empty float height and float retention matches OE specifications and guarantees correct gas gauge reading
Lower amperage draws less load on vehicle’s electrical system
Part is validated, tested and matched to the right vehicle application
Always be sure to check and clean fuel tank to avoid unnecessary returns
Lower failure rates due to its innovative design and durability

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$339.99

Fuel Pump and Level Sensor Module with Seal and Float

Product Features:

Helps provide a reliable fuel supply to your vehicle’s engine
Electrical connections are designed to help eliminate high resistance due to vehicle vibration
Designed to optimize pump life and reduce fuel pump noise
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$245.99

Please note: Advance Auto Parts is proud to carry comparable exact-fit parts from multiple vendors, as such, the item you receive may be one of two quality brands. Both brands meet the same fitment requirements and are equal in their performance and specifications. Carquest or Airtex fuel pump modules offer OEM or better performance from an Original Equipment Supplier. The latest advancements in fuel delivery technology are built-in to every Carquest or Airtex Fuel Pump to deliver greater reliability.

Product Features:

All Carquest fuel pumps are designed to meet or exceed OE specs and are 100% tested to ensure performance and long-life.
High-efficiency turbine technology provides quiet and precise fuel delivery
Carbon commutator technology provides improved durability and robust performance for gasoline and flexible fuel
Carquest fuel pump features external rubber feet for enhanced stability and reduced noise from vibration.
Carquest Fuel Pump has modified return porting to increase flow resulting in lower failure rates. Upgraded convoluted tubing improves durability to resist tube wear failure and create longer life.

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$168.99

Carquest Premium fuel pump modules and assemblies are engineered by Carter Fuel Systems or Agility Auto Parts to meet or exceed Original Equipment (OE) specifications for fit, form and function. We have invested in industry-leading quality improvements like upgraded turbine impellers and 100% carbon commutators to deliver greater reliability. Carquest Premium fuel pump modules are supplied with the pump strainer and gaskets or seals when required for the application. Carquest Premium fuel pump modules are engineered with superior quality components to provide the longest life and reliable performance.

Product Features:

Meets or exceeds OE specifications for fit, form and function
100% carbon commutators provide resistance to aggressive fuels and double the life expectancy of the pump
OE upgraded turbine impellers greatly reduce fuel pulsation
All fuel pumps are 100% performance tested
Includes installation gaskets or seals where applicable

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$58.99

This fuel sender connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this fuel sender connector matches the appearance and function of the factory hardware on specified applications.
Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$34.99

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

from

$17.79

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

Top Picks for 2003 Cadillac Escalade EXT Fuel Injectors

Upgrade Cadillac Escalade EXTs with top-quality Fuel Injectors parts, including 26 OEM and aftermarket selections for your 2003 model.

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from

$146.99

Every single Delphi mass air flow (MAF) sensor that we manufacture – whether with or without the housing – is built with calibrated all-new components and is never remanufactured. Our mass air flow sensors are designed and tested to meet or exceed OE requirements, and engineered for a perfect fit in more than 180 million vehicles on the road today in North America – including makes from Ford, Toyota, Nissan, Volkswagen, Hyundai, BMW, Honda, GM, Mazda, Subaru, Acura and more.

Product Features:

Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
All parts are calibrated and tested to match the OE part
Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube
Delphi OE technology validated to match the vehicle applications

from

$9.99

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

from

$29.99

Helps provide a seal to prevent fuel leaks
Helps seal combustion chamber from the elements
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$8.49

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

from

$90.99

Advance Auto Parts is proud to carry all new mass air flow sensors that use high-quality components with the highest quality standards.

Product Features:

CARQUEST MAF use all new high-quality components at the highest quality standards.
Manufactured with new and advanced technology to perform, fit and function at OE specifications.
All new product that is tested with OEM equipment to OEM standards
Outperforms competition when tested in extreme environmental conditions

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$82.99

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

Designed to OE standards for ease of installation
Application-specific to ensure the proper fit and form
Precision-engineered pressure regulators for proper fuel delivery and engine performance
As a global manufacturer, we have complete control of the manufacturing process, from components to finished product?

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$113.99

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

Designed to OE standards for ease of installation
Precision-wound and precision-trimmed solenoid windings allow the computer to command efficient delivery of fuel
High-temp Viton® O-rings enable prolonged sealing of injector under extreme heat conditions
Fiber-optic yttrium aluminum garnet “YAG” laser welding and 100 million cycle testing ensure quality in every box

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$75.99

CARQUEST’S line of remanufactured OEM fuel injectors are remanufactured using a proven 15 step process at a state-of-the-art remanufacturing facility in the U.S.A. Each injector is 100% tested under multiple operating conditions to ensure each injector meets or exceeds OE specifications for flow rate, spray pattern, coil resistance, form, fit and function. Each injector includes new external seals and O-rings.

Product Features:

Each unit is 100% tested to OE specifications
Includes new O-rings and seals made of premium OE quality materials
Includes application specific technical bulletin, where applicable

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$112.99

ACDelco GM Original Equipment Fuel Injection Pressure Regulators are mechanical valves that control fuel pressure in the fuel injector rail, and are GM-recommended replacements for your vehicle’s original components. Their spring-loaded valves return excess fuel back to the fuel tank. These original equipment fuel injection pressure regulators have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Helps provide constant fuel pressure to the injectors
Assists in cold engine starts
Helps maintain stable engine idle
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$3.99

CARQUEST fuel injector seal kits include the necessary O-rings and seals to properly reseal the injector, which is a recommended practice any time the injector is removed. Each kit services one injector and includes hard to find or previously dealer-only components.

Product Features:

Premium OE quality materials
Services one injector

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$114.99

This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Atomizes fuel into the engine’s intake manifold or cylinders, as part of the fuel and engine management system
Allows for a quick throttle response
Assists in cold engine starts
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$83.99

WVE is a leading source of advanced vehicle electronics components for replacement applications in the automotive aftermarket and original equipment applications. WVE offers high-technology manufacturing along with innovative solutions and improvements to OE designs. Every component either matches or improves on the OE design to ensure fast, easy installation, superior performance and reliability.

Product Features:

Application matched components ensure fuel injection system meets all emission regulations.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.

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$36.99

GM Genuine Parts Fuel Injection Fuel Rail O-Ring Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$95.99

Precision is key for the fuel pressure regulator on any vehicle. At Delphi, we use OE engineering to test our regulators and fuel technologies to ensure the utmost performance and durability. Our Nitrile¿ diaphragms are resilient against high-ethanol fuels, and we utilize two designs to help meet emissions standards while covering a wide array of domestic vehicles. With over 30 OE-proprietary innovations and 150 patents in fuel technologies, Delphi is regarded as a market leader in North American fuel management. Visit our Resource Center for helpful tips and tricks on fuel pumps technologies and more: https://www.delphiautoparts.com/usa/en-US/resource-center.

Product Features:

Precisely manufactured internal valves, diaphragms and springs means excellent performance under all engine operating conditions
Quiet operation, no audible regulator noise
Robust diaphragm materials means longer life, improved durability and compatibility with a wide range of fuels
Consistent and predictable fuel pressure throughout system range of control provides great drivability

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$44.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Product constructed to meet all design and operating characteristics as intended by the manufacturer.
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$309.99

GM Genuine Parts Fuel Injection Throttle Control Actuator Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These modules are electrically operated motor assemblies that control throttle plates. They receive an electrical signal from the engine control module and open throttle plates based on input from the accelerator pedal module. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$50.99

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$27.99

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

from

$13.79

GM Genuine Parts Fuel Injector and Insulator Retainer Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$145.95

Fully tested against leaks
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

Pro-Flo 4 EFI XT-Style Kit No. 35993 For Chevy LS Gen III/IV Small-Block

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$2866.99

The Edelbrock part No. 35993 Pro-Flo 4 XT Sequential Port EFI System for Chevrolet LS GEN III/IV engines is equipped with the latest in technology and features. The EFI system comes complete with a Pro-Flo XT rectangular port black finish intake manifold and 35 Lb/Hr injectors capable of 550 HP with 58 p.s.i. fuel pressure. The new Pro-Flo 4 EFI systems feature an all-new ECU with a faster processor, a water proof design and measures half the depth of the previous ECU. It also has an upgraded Bluetooth chip that is faster, more reliable and will not drop connection. We’ve added more features for the advanced tuner giving you control over air-fuel ratios, ignition curve, idle speed, acceleration fuel, coolant fans, Rev limiter while retaining the simplicity Pro-Flo is known for. The key to the system is our exclusive E-Tuner 4 app with dyno developed base calibrations. The E-Tuner 4 app uses a Bluetooth wireless connection to communicate with the ECU’s self-learning capability to continually adjust the calibration to get the maximize performance of your engine. E-Tuner 4 features a simple and easy to use setup wizard to help you get started. Best of all, the E-Tuner 4 app is free and can be downloaded from the Google Play Store, allowing you to use your personal Android based smart phone or tablet. If you don’t have a compatible device, then we also offer kits that include a 7″ Android tablet with the E-Tuner 4 app pre-installed. Multiple dash displays are included to allow you to monitor engine vitals and performance from your Android smart phone or tablet. Pro-Flo 4 does not require laptop tuning.

from

$479.99

The Carquest line of remanufactured OEM fuel injectors are remanufactured using a proven 15 step process at a state-of-the-art remanufacturing facility in the USA. Injectors are thoroughly tested under multiple operating conditions to ensure each injector meets or exceeds OE specifications for flow rate, spray pattern, coil resistance, form, fit and function.

Product Features:

Includes eight premium fuel injectors
Each unit is 100% tested to OE specifications
Includes new o-rings and seals made of premium OE quality materials
Includes application specific technical bulletin, where applicable

from

$165.99

Delphi’s history is one of OE heritage and quality. Our global technical requirements include design specifications and validation testing based on over 100 years of OE experience. Our material selections, material thickness, and material types are built from OE specifications to exceed aftermarket expectations. We put in place strict manufacturing processes to ensure quality control in every part we make. Delphi’s pioneering spirit delivers innovative solutions designed to support the aftermarket in servicing the vehicles of today, and tomorrow.

Product Features:

100% O Ring replacement
All Delphi injectors are tested utilizing OE methodologies
Delphi injectors are produced in a Delphi ISO 9001:2008 certified facility
No internal seal rings equals minimized leakage
Recessed fuel exit minimizing possible plugging
Reduced spray variation, accurate fuel spray pattern mean better emissions and cold start capabilities
Thermally isolates fuel from engine by drawing manifold heat away from the fuel rail eliminating engine hesitation due to vapor lock

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$90.99

CARDONE Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100 percent re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.

Product Features:

100 percent re-solder of critical components ensures superior electrical connections, no intermittent failures and longer product life.
On-car vehicle validation routines ensure that modules meet all form, fit, durability and performance requirements.
All modules are 100 percent tested with automated computer test equipment to ensure full functionality and reliability.
Our sensors precisely track O.E. output curves and maintain spec tolerances to ensure accurate feedback to the vehicle’s engine control management system.
Components are rated to handle demanding temperature variations for optimum reliability in every environment.
As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80 percent.

In-Demand Oxygen Sensors for 2003 Cadillac Escalade EXTs

Select from 11 premium Oxygen Sensors parts for your 2003 Cadillac Escalade EXT, with prices ranging from $53.99 to $147.99.

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from

$103.99

Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Direct Fit includes OE Connector for easy installation
Performance meets or exceeds OE specifications
True Direct-fit OE connectors and harness

from

$99.99

DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled performance. Each component is precision built for exact replacement, and a first time fit. This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead poisoning for improved engine performance, greater fuel efficiency, and unparalleled longevity. DENSO gives you the right part and the right fit.

Product Features:

Specifically designed to meet the increasing demands of today’s engines
100 percent checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

from

$69.99

Bosch is the world¿s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Includes Smart Link Connector, no soldering required
No special tools required for installation
Seared protection tube due to 100% functional quality test
Recommend to use OTC 6500 Flexihead O2 Sensor Wrench

from

$81.99

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Direct Fit includes OE Connector for easy installation
Performance meets or exceeds OE specifications
True Direct-fit OE connectors and harness

from

$89.99

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Includes Smart Link Connector, no soldering required
No special tools required for installation
Seared protection tube due to 100% functional quality test
Performance meets or exceeds OE specifications

from

$69.99

Specifically designed to meet the increasing demands of today’s engines
100 percent checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

from

$61.99

Specifically designed to meet the increasing demands of today’s engines
100 percent checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

from

$90.99

GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle’s exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the airfuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

This part requires programming andor special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Detects oxygen content in the exhaust gases to help optimize emissions
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$147.99

GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle’s exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle
Detects oxygen content in the exhaust gases to help optimize emissions
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

from

$103.99

NGK is the sensor specialist for import and domestic applications. Established under the NGK product family, oxygen sensors are part of our ongoing commitment to streamlining product types and increasing coverage. A ceramic company at our core, uses cutting-edge technology to control the ceramic used in our oxygen sensors from raw material to finished product. is the world’s largest supplier and manufacturer of OE oxygen sensors. Combining expertise and innovation, oxygen sensors deliver superior fit, form, and function. oxygen sensors undergo extensive testing during manufacturing to ensure quality and reliability that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for comprehensive market support and OE application technology.

Product Features:

OEM QUALITY: is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$53.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

Most Sold 2003 Cadillac Escalade EXT Air Flow Sensors

Explore our best-selling Cadillac parts for the 2003 Escalade EXT among 13 OEM and aftermarket options starting from $13.99.

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from

$67.05

Direct-fit OE replacement ensures ease of installation
Designed to meet OE performance
As the leader in commercially acceptable parts, we provide professional technicians with the quality parts they need
As the leader in commercially acceptable parts, we provide professional technicians with the quality parts they need

from

$89.99

ACDelco GM Original Equipment Manifold Absolute Pressure (MAP) Sensors measure intake manifold pressure, and are GM-recommended replacements for your vehicle’s original components. The MAP sensor is a part of the fuel and engine management system. Its signal is used by the engine control module along with the throttle position sensor to calculate the amount of air entering the engine so that the correct amount of fuel is injected for optimum combustion. These original equipment manifold absolute pressure sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

Sends signals to the engine controls for optimal engine performance
Designed to adjust engine performance to various altitudes
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$35.99

ACDelco GM Original Equipment Multi Purpose Temperature Sensor is a GM-recommended replacement component for one or more of the following vehicle systems: hvac. This original equipment sensor will provide the same performance, durability, and service life you expect from General Motors.

Product Features:

GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

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$37.99

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$81.99

Building upon a foundation of premium full-line products established under NGK ignition and oxygen sensor products, NTK’s expansion to technical sensors is part of our ongoing commitment to streamline product types and increase coverage under one premium brand NTK, The Sensor Specialist. With over 80 years of automotive expertise, NGK’s family of automotive products are driven by extreme dedication to innovation, performance and quality. is the only OE supplier with a full line of technical sensors in the aftermarket for import and domestic vehicles. Drawing from OE experience, sensors undergo extreme testing conditions that include thermal shock, vibration and OBD verification. sensors are manufactured to ensure a quality that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

The Manifold Absolute Pressure Sensor (MAP) provides manifold pressure information to the Engine Control Unit (ECU). The data is used to determine the air mass flow rate and required fuel for optimum combustion and ignition timing.
NTK’s Manifold Absolute Pressure Sensors are manufactured to operational performance standards to meet or exceed OE fit, form and function to ensure proper manifold pressure, fuel metering and ignition timing.

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$34.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Product constructed to meet all design and operating characteristics as intended by the manufacturer.
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$51.99

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$26.99

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Product constructed to meet all design and operating characteristics as intended by the manufacturer.
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$54.99

Protective outer coverings help provide long-lasting durability
Color-coded wires allow for easy installation
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$40.99

The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
Application matched components ensures system operation in like new condition.

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$106.99

Manifold Absolute Pressure Sensor

from

$25.99

Repairs the outside temperature display function caused by failed ambient temp sensor
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

from

$13.99

Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

Top-Rated Fuel and Emissions Systems Brands For Your 2003 Cadillac Escalade EXT

Shop for the best-rated brands offering Fuel and Emissions Systems and other products for your 2003 Cadillac Escalade EXTs. Below you’ll find some of our best rated Fuel and Emissions Systems from FELPRO, GM Genuine, and Carquest Premium, and more. Fuel and Emissions Systems from these brands that fit a 2003 Escalade EXT start at just $3.29 and are rated as high as 4.6 stars. OEM and aftermarket Fuel and Emissions Systems don’t get more top quality, durable, and affordable than from the brands below.

Popular FELPRO 2003 Cadillac Escalade EXT Fuel and Emissions Systems

When it comes to maintaining or upgrading your 2003 Cadillac Escalade EXT, using quality Fuel and Emissions Systems is essential to ensure durability and a perfect fit. FELPRO ticks all of those boxes. We offer a wide selection of FELPRO Fuel and Emissions Systems, specifically designed for the 2003 Cadillac Escalade EXT. With over 3 FELPRO brand Fuel and Emissions Systems in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $3.29, with an average price of just $5.69. Plus, with over 18 customer reviews and an average rating of 4.6 stars, you can trust that our FELPRO Fuel and Emissions Systems will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $3.79

(3)

Exhaust Gas Recirculation (EGR) Valve Gasket

“Fit like the original”

from $9.99

(14)

Fuel Injector O-Ring Kit

“I rebuilt my engine using a off-brand gasket kit. The O-rings that came with the kit did not fit right. I bought these from Advance. They were Felp”

from $3.29

(1)

Exhaust Gas Recirculation (EGR) Valve Gasket

“Installed on my 99 Silverado Z71. Perfect fit and good price.”

Popular GM Genuine 2003 Cadillac Escalade EXT Fuel and Emissions Systems

GM Genuine auto parts is one of the highest quality Fuel and Emissions System brands in the market. Any 2003 Cadillac Escalade EXT owner should feel confident when installing genuine GM Genuine parts in their vehicle. To ensure the best fit and performance for your 2003 Escalade EXT, Advance Auto Parts carries a full inventory of 3 GM Genuine Fuel and Emissions Systems. Plus you will be keeping your Cadillac in peak condition while saving money because prices on these GM Genuine Fuel and Emissions Systems range from $35.99 to $55.99, plus, with more than 6 customer reviews and an impressive 4.5 stars average rating, you can be confident the Fram Fuel and Emissions Systems below will deliver on both quality and value.

from $35.99

(1)

Ambient Air Outside Temperature Sensor

“The part was perfect. Unfortunately, it did not resolve my issue.”

from $55.99

(4)

Vapor Canister Purge Valve

“Easiest fix yet. Youtube where it goes took longer than actual install”

from $55.99

(1)

Vapor Canister Vent Valve

“Works great. Turned the check engine light right off.”

FAQs for 2003 Cadillac Escalade EXT Fuel and Emissions Systems

Which Fuel and Emissions Systems are best-sellers for 2003 Cadillac Escalade EXTs?

Out of 104 Fuel and Emissions Systems that fit 2003 Cadillac Escalade EXTs, the following parts are the top sellers:

Fuel Cap: Round, Direct Fit, Provides Tight Seal, 1 Pack (18481528) – $14.99
Fuel Injector O-Ring Kit (3504360) – $8.49
Oxygen Sensor: 4 Wire, 24.02" Long, Heated, Universal (19370039) – $89.99

What’s the price range for 2003 Cadillac Escalade EXT Fuel and Emissions Systems?

Fuel and Emissions System prices for the 2003 Cadillac Escalade EXT start at $1.59 and go up to $2,866.99 for the most premium parts.

What’s the average price of a Fuel and Emissions System for a 2003 Cadillac Escalade EXT?

The average price for Fuel and Emissions Systems for the 2003 Cadillac Escalade EXT is $111.30. Keep in mind the variety of part types within our Fuel and Emissions System category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Fuel and Emissions Systems for other Cadillac Escalade EXT model years?

Yes, we currently carry Fuel and Emissions Systems for 10 model years of Cadillac Escalade EXTs between 2002 and 2013. Fuel and Emissions Systems are bought most frequently for the following model years: 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, and 2005.

What are the cheapest Fuel and Emissions Systems for my 2003 Cadillac Escalade EXT?

The cheapest 2003 Cadillac Escalade EXT Fuel and Emissions Systems we carry in stock are:

Rivet-Push In-Hole Diameter .250 In. (sold by each) (22142348) – $1.59
Exhaust Gas Recirculation (EGR) Valve Gasket (15780617) – $2.79
Exhaust Gas Recirculation (EGR) Valve Gasket (15780238) – $3.29
Exhaust Gas Recirculation (EGR) Valve Gasket (15780239) – $3.79
Fuel Injector Seal Kit (11450036) – $3.99

What are the top-rated Fuel and Emissions Systems that fit the 2003 Cadillac Escalade EXT?

Out of 789 reviews by customers, our 2003 Cadillac Escalade EXT Fuel and Emissions Systems have an average customer rating of . These are some of the highest-rated Fuel and Emissions System types for the 2003 Cadillac Escalade EXT and their top-rated products:

Vapor Canister Purge Valves
- Evaporative Emissions Canister Vent Valve Repair Kit with Filter Assembly (11320249) – $98.99
- Vapor Canister Vent Valve (11680405) – $55.99
- Vapor Canister Purge Valve (15730292) – $55.99
Air Flow Sensors
- Evaporative Emissions Canister Vent Valve Repair Kit with Filter Assembly (11320249) – $98.99
- Vapor Canister Vent Valve (11680405) – $55.99
- Vapor Canister Purge Valve (15730292) – $55.99

What types of Fuel and Emissions Systems do you sell for my 2003 Cadillac Escalade EXT?

As of 11/2/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 2003 Cadillac Escalade EXT:

Can I get help with 2003 Cadillac Escalade EXT Fuel and Emissions System orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Cadillac Fuel and Emissions Systems and more.

What is your return policy for Cadillac Escalade EXT Fuel and Emissions Systems?

Advance Auto Parts keeps returns simple. For new Cadillac Escalade EXT Fuel and Emissions Systems and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2003 Cadillac Escalade EXT Fuel and Emissions Systems

ACDelco – Sequential Multi-Port Fuel Injector Assembly (Part No.217-1621)

Carquest Premium – Multi-Use Connector (Part No.PTA1096)

Carquest Premium – New MAP SENSOR (Part No.ECE1033)

Dorman – Rivet-Push In-Hole Diameter .250 In. (sold by each) (Part No.700-579)

GM Genuine Parts – Ambient Air Temperature Sensor (Part No.15-51150)

Spectra Premium – Fuel Filler Neck (Part No.FN779)

Delphi – Fuel Tank Cleaning Kit (Part No.FC01)

GM Genuine Parts – Manifold Absolute Pressure Sensor Seal (Part No.16194007)

GM Genuine Parts – Vapor Canister (Part No.215-407)

Driveworks – Electrical Relay (Part No.83267)

Carquest Premium – Fuel Level Sensor (Part No.KBE1044)

GM Genuine Parts – Multi-Purpose Wire Connector (Part No.PT2784)

aFe POWER – Sprint Booster (Part No.77-14003)

Carquest Premium – Vapor Canister Purge Solenoid: Includes Mounting Hardware (Part No.CPC1001)

GM Genuine Parts – Multi-Port Fuel Injector Rail (Part No.217-1542)

Carquest Premium – Multi-Use Connector (Part No.PTA1077)

GM Genuine Parts – Vapor Canister Vent Valve (Part No.214-1091)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)

GM Genuine Parts – Fuel Injector O-Ring Kit with Assorted O-Rings (Part No.217-1588)

Carquest Premium – Multi-Use Connector (Part No.PTA1517)

ACDelco – GM Original Equipment Fuel Injection Pressure Regulator (Part No.C3000446165ACD)

Dorman – Fuel Pump Lock Ring (Part No.579-102)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17511)

Carquest – Fuel Tank Straps (Includes 2 Straps) (Part No.578-237)

Felpro – Exhaust Gas Recirculation (EGR) Valve Gasket (Part No.70947)

Cardone – Remanufactured Mass Air Flow Sensor (Part No.74-50074)

GM Genuine Parts – Vapor Canister Purge Tube (Part No.12658354)

GM Genuine Parts – Fuel Injection Fuel Rail Bolt (Part No.12554211)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17591)

Carquest Premium – Fuel Cap: Round, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10837)

Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10834)

Carquest Premium – Gas Cap: Twist On, Reduces Air Pollution, 1 Pack (Part No.10817)

Carquest Premium – Locking Fuel Tank Cap (Part No.10501)

Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10819)

Carquest Premium – Locking Fuel Tank Cap (Part No.10591)

Carquest Premium – Locking Fuel Cap: Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10504)

Carquest Premium – Locking Fuel Tank Cap (Part No.10507)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17504)

Motorad – Non-Locking Tethered Fuel Tank Cap (Part No.MGC817T)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17507)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17505)

Delphi – Fuel Pump Module Assembly: With Float Arm, Seal (Part No.FG0273)

GM Genuine Parts – Fuel Pump and Level Sensor Module with Seal and Float (Part No.MU1738)

Carquest Premium – Fuel Pump Module Assembly (Part No.E3556M)

Carquest Premium – Fuel Pump Module Assembly: Fuel Pump, Sending Unit and Strainer (Part No.M2246724)

Dorman – Fuel Sending Unit Pigtail (Part No.645-221)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12427)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)

Delphi – Mass Air Flow Sensor (Part No.AF10043)

Felpro – Fuel Injector O-Ring Kit (Part No.ES 71190)

GM Genuine Parts – Fuel Injector O-Ring Kit with Assorted O-Rings (Part No.217-1588)

Felpro – Fuel Injector O-Ring Kit (Part No.ES 70599)

Carquest Premium – Mass Air Flow Sensor (MAF) – 100% NEW (Part No.MQ7202)

Carquest – Fuel Injection Pressure Regulator (Part No.24027)

Carquest – Fuel Injector (Part No.67363)

Carquest Premium – Remanufactured Fuel Injector (Part No.A211-1803)

GM Genuine Parts – Fuel Injection Pressure Regulator Kit with Clip and Snap Ring (Part No.217-3073)

Carquest Premium – Fuel Injector Seal Kit (Part No.AS017)

ACDelco – Multi-Port Fuel Injector (Part No.17113698)

Wells Vehicle Electronics – Fuel Injection Pressure Regulator (Part No.5G1070)

GM Genuine Parts – Fuel Injection Fuel Rail O-Ring Kit with 3 O-Rings (Part No.17113552)

Delphi – Fuel Injection Pressure Regulator (Part No.FP10021)

Carquest Premium – Multi-Use Connector (Part No.PTA1096)

GM Genuine Parts – Fuel Injection Throttle Control Actuator Module (Part No.12588923)

GM Genuine Parts – Black Multi-Purpose Pigtail (Part No.PT2135)

Felpro – Fuel Injector O-Ring Kit (Part No.ES 73217)

GM Genuine Parts – Fuel Injector Retainer Kit with Clip (Part No.12570620)

ACDelco – GM Original Equipment Fuel Injection Pressure Regulator (Part No.C3000446165ACD)

Edelbrock – Pro-Flo 4 EFI XT-Style Kit No. 35993 For Chevy LS Gen III/IV Small-Block (Part No.35993)

Carquest Premium – Reman Multi Port Fuel Injector – 8 Pack (Part No.A211-1803-8PK)

Delphi – Fuel Injector (Part No.FJ10062)

Cardone – Remanufactured Mass Air Flow Sensor (Part No.74-8411)

Bosch – Oxygen Sensor: 4 Wire, 14.96" Long, Heated, Exact Fit (Part No.15282)

DENSO – Oxygen Sensor: 4 Wire, 14.76" Long, Heated, Exact Fit (Part No.234-4669)

Bosch – Oxygen Sensor: 4 Wire, 24.02" Long, Heated (Part No.15740)

Bosch – Oxygen Sensor: 4 Wire, 16.93" Long, Heated, Exact Fit (Part No.15895)

Bosch – Oxygen Sensor: 4 Wire, 24.02" Long, Heated, Universal (Part No.15730)

DENSO – Oxygen Sensor: 4 Wire, 11.77" Long, Heated, Universal Fit (Part No.234-4212)

DENSO – Oxygen Sensor: 4 Wire, 16.54" Long, Heated, Exact Fit (Part No.234-4651)