2003 GMC Sierra 2500 Cooling and Climate Controls

Essential 2003 GMC Sierra 2500 Cooling and Climate Controls

KAI – HVA/C Heater Core (Part No.HTR010095)

HVA/C Heater Core

from

$64.99
New Standard Replacement Front Heater Core

Product Features:
  • Made Of Aluminum
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
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ACDelco – Relay (Part No.P2020846897ACD)

Relay

from

$78.90
Relay

Dorman – Help – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.82597)

Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack

from

$15.49
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.

Product Features:
  • Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
  • Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
  • Seamless fit – reverse-engineered from the original equipment to fit perfectly
  • Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
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ACDelco – 15-80692 GM Original Equipment Engine Cooling Fan Blade (Part No.G5050374437ACD)

15-80692 GM Original Equipment Engine Cooling Fan Blade

from

$109.23
ACDelco GM Original Equipment Engine Cooling Fan Blades are located between the radiator and engine and are GM-recommended replacements for your vehicle’s original components. The fan is a part of the engine cooling system, which moves air across the radiator and A/C condenser to remove heat from the engine cooling system and the AC refrigerant system. The fan may be belt-driven or operated by an electric motor. This cooling fan blade has been manufactured to fit your specific GM vehicle, providing 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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GM Genuine Parts – Engine Coolant Thermostat Water Inlet Assembly (Part No.15-10412)

Engine Coolant Thermostat Water Inlet Assembly

from

$72.99
GM Genuine Parts Engine Coolant Thermostat / Water Inlet Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These engine coolant thermostat / water inlet assemblies contain the engine thermostat and water inlet housing. The engine coolant thermostat controls the flow of coolant through the radiator; enabling the engine to reach and maintain its normal operating temperature. The water inlet housing connects the radiator hoses to the thermostat. For certain applications, the water inlet contains threaded holes or ports for sensors and switches. 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:
  • Provides a durable leak-resistant seal
  • Repairs leaking thermostat housings
  • Corrects engine overheating caused by failed thermostat
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • Original equipment parts are designed to work with your GM vehicle safety systems — aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
  • GM regularly updates production and service part designs to integrate new materials and technologies
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Dorman – Help – Radiator Drain Cocks (Part No.61136)

Radiator Drain Cocks

from

$4.99
This radiator drain petcock is a direct replacement for the original equipment plug that may have deteriorated or corroded. Made of quality materials, this petcock is engineered to strict standards for durable use over time.

Product Features:
  • Direct replacement – this radiator drain petcock matches the fit and function of the original equipment part
  • Durable construction – this part is made of quality materials for a long service life
  • Saves money – offers original equipment quality at a competitive price
  • Quality assured – this petcock has undergone virtual testing to assure proper fit and function
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Autopart International Inc – Radiator (Part No.G10002029165API)

Radiator

from

$146.64
Radiator

ACDelco – Instrument Panel Air Duct Air Temperature Sensor (Part No.15-5632)

Instrument Panel Air Duct Air Temperature Sensor

from

$9.99
ACDelco GM Original Equipment HVAC 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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ACDelco – GM Original Equipment Expansion Tank Cap (Part No.G1040206092ACD)

GM Original Equipment Expansion Tank Cap

from

$25.37
An ACDelco GM Original Equipment Expansion Tank Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component. It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off. This original equipment radiator cap has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Get the GM quality you know and trust with ACDelco GM Original Equipment Thermostats and Caps. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Thermostats and Caps are engineered for virtually every model of GM car, light duty truck, and sport utility vehicle.

Product Features:
  • Seal and maintain pressure on the cooling system for vehicle safety
  • Raise the boiling point of the engine coolant to maintain efficiency
  • Fit most models of GM vehicles for expanded coverage
  • 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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Carquest Premium – Engine Coolant Thermostat Housing (Part No.85254)

Engine Coolant Thermostat Housing

from

$54.99
High quality OE replacement part with all components needed to complete the job

Product Features:
  • Meets and/or exceeds OEM standard
  • Includes quality gasket or O-ring  to ensure proper seal (where applicable
  • Coated with corrosion and rust inhibitor
  • 100% leak tested
  • Direct-fit replacement for ease of installation
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Carquest Premium – Ambient Light Sensor (Part No.TAA1003)

Ambient Light Sensor

from

$34.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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Carquest Premium – Coolant Temperature Sensor (Part No.WTC1002)

Coolant Temperature Sensor

from

$20.99
Approved materials for increased durability in even the most extreme temperatures. All MotoRad Coolant Temperature Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.

Product Features:
  • 100% factory resistance calibrated to ensure precision tolerances, resulting in extremely accurate temperature for optimal performance
  • Thread Sealant and/or O-ring pre-installed on applicable sensors to ensure leak free performance
  • Brass sensor housing precision machined to meet or exceed OE thermal conductivity
  • OE precision matched thermistor position for correct output parameters
  • Extensive product testing includes salt spray, high/low temperature impact, thermal vibration, durability, static electricity, and micro tension, among other tests, to ensure all sensors meet or exceed OEM specifications.
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Dorman – Pressurized Coolant Reservoir: Clear, Plastic, Original Equipment Replacement (Part No.603-102)

Pressurized Coolant Reservoir: Clear, Plastic, Original Equipment Replacement

from

$71.99
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part.

Product Features:
  • Direct replacement – this engine coolant reservoir matches the fit and function of the original part
  • Ideal solution – engineered for a seamless installation
  • Durable construction – manufactured from quality materials to withstand underhood heat and vibration
  • Trustworthy design – backed by 100 years of automotive aftermarket experience
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KAI – Radiator Support (Part No.GM1225245)

Radiator Support

from

$79.99
New Standard Replacement Radiator Support Latch, 1500 Crewcab/2500/3500 For SUV Fits 2500 Series And All 8.1 Engine Applications

Product Features:
  • 1500 Crewcab/2500/3500 For SUV Fits 2500 Series And All 8.1 Engine Applications, Made Of Aluminum
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
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Carquest Premium – Engine Cooling Fan Module (Part No.ACC1313)

Engine Cooling Fan Module

from

$94.99
All modern vehicles consist of several independent operating systems controlled by a main system processor with independent sub-processors. The sub-processors provide class 2 serial information data to the main processor while handling the operation of the system and carry the circuit load to protect the main operating system. When replacing any level processor programming may be needed to enter the unit into the vehicles main operating system.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
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Permatex – Sensor-Safe, High-Torque RTV Silicone Gasket Maker (Part No.82194)

Sensor-Safe, High-Torque RTV Silicone Gasket Maker

from

$11.49
Permatex Ultra Grey is specified for high torque and high vibration applications. Ultra Grey offers a sensor-safe, low odor, non-corrosive formula and is OEM specified to fit dealership warranty requirements. This high performance gasket maker meets performance specs of OE silicone gaskets and can be used on high torque and vibration applications such as valve covers, water pump, intake manifold end seals ad thermostat housings.

Product Features:
  • High torque and rigidity
  • Sensor-safe, non-corrosive formula
  • OEM specified
  • Low-odor, non-corrosive formula
  • Ideal for closed spaced bolt patterns
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ACDelco – GM OE A/C Compressor Clutch Kit with Clutch, Coil, and Pulley (Part No.R1010511135ACD)

GM OE A/C Compressor Clutch Kit with Clutch, Coil, and Pulley

from

$353.92
ACDelco GM Original Equipment A/C Compressor Clutch Kits include the compressor clutch, which engages and disengages the compressor when the A/C is switched ON and Off, and other related components. The compressor clutch consists of a pulley, pressure plate, and electromagnetic coil. This original equipment A/C compressor clutch kit is a GM-recommended replacement for you 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:
  • Restore A/C compressor clutch to like new performance
  • 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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Factory Air – Compressor Mounted Low Cut-Out Pressure Switch (Part No.35973)

Compressor Mounted Low Cut-Out Pressure Switch

from

$31.49
High quality OE replacement part with all components needed to complete the job

Product Features:
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Color coded for easy identification
  • Zinc coated to resist corrosion
  • Improved 2 terminal design replacing older 1 terminal switch
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Factory Air – Compressor Mounted Low Cut-Out Pressure Switch (Part No.35970)

Compressor Mounted Low Cut-Out Pressure Switch

from

$34.49
High quality OE replacement part with all components needed to complete the job

Product Features:
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Color coded for easy identification
  • Zinc coated to resist corrosion
  • Improved 2 terminal design replacing older 1 terminal switch
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ACDelco – 4-Way Female Black Multi-Purpose Pigtail (Part No.PT548)

4-Way Female Black Multi-Purpose Pigtail

from

$36.99
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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Driveworks – HVAC Blower Motor Resistor (Part No.13028)

HVAC Blower Motor Resistor

from

$27.49
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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ACDelco – Multi-Purpose Pigtail (Part No.PT1357)

Multi-Purpose Pigtail

from

$37.99
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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GM Genuine Parts – Engine Cooling Fan Clutch (Part No.15-4694)

Engine Cooling Fan Clutch

from

$348.99
GM Genuine Parts Engine Cooling Fan Clutches are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These engine cooling fan clutches control the speed of the radiator fan based on the temperature of the air after it passes through the radiator fins. 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 quiet noisy cooling fans with stuck fan clutches
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • Original equipment parts are designed to work with your GM vehicle safety systems — aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
  • GM regularly updates production and service part designs to integrate new materials and technologies
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Dorman – Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (Part No.45813)

Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In

from

$1.99
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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KAI – A/C Suction Hose (Part No.HOS010996)

A/C Suction Hose

from

$47.99
New Standard Replacement A/C Refrigerant Suction Hose

Product Features:
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

ACDelco – 3-Way Female Black Multi-Purpose Pigtail (Part No.PT420)

3-Way Female Black Multi-Purpose Pigtail

from

$40.99
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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Carquest Premium – Cabin Air Temperature Sensor (Part No.WTA1323)

Cabin Air Temperature Sensor

from

$57.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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Carquest Premium – A/C Compressor and Component Kit (Part No.3921K)

A/C Compressor and Component Kit

from

$379.99
Save time on installation with everything you need in one box for an air conditioning replacement. The Carquest Premium A/C Compressor and Component Kit includes the necessary compressor, accumulator/receiver drier, and orifice tube/expansion valve, along with the necessary O-rings, gaskets, and oil. The parts are manufactured with strict quality standards from Gilmore, a climate control partner to Advance Auto Parts for over 25 years.

Product Features:
  • Each new compressor design undergoes rigorous life cycle testing at high RPMs and pressures to ensure that they can withstand years in the harshest conditions.
  • New compressors are designed with utmost precision using 3D coordinate measuring machines to ensure a perfect fit.
  • The production process contains automated controls at every stage that alerts and halts production in case of an error, assuring that the finished product will always be flawless.
  • All new compressors must pass a helium leak test and pump up function test prior to packaging.
  • Accumulators and receiver driers meet or exceed original equipment standards for moisture absorption, pressure and temperature resistance, air tightness, vibration resistance, corrosiveness, and pulse pressure.
  • Desiccant is 100% tested and assembled in a controlled environment to ensure performance meets or exceeds original equipment standards.
  • All accumulators are helium leak tested prior to packaging.
  • Each orifice tube and expansion valve is tested for function and leakage according to OEM specifications to ensure optimal performance of the air conditioning system.
  • The specific PAG oil required by your vehicle application is included.
  • O-rings and gaskets for all parts are application specific and packaged with the correct part to save time and eliminate the possibility of a leak from using the wrong O-ring or gasket.
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Popular 2003 GMC Sierra 2500 Cooling and Climate Controls Categories

2003 GMC Sierra 2500 Cooling and Climate Controls

You count on your 2003 GMC Sierra 2500 to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Cooling and Climate Controls. With 206 Cooling and Climate Controls ranging in price from $1.29 to $577.99, you’re sure to find everything you need for your 2003 GMC Sierra 2500.

Brands matter. If you want to shop a specific Cooling and Climate Controls brand, we stock 25 different brands like Carquest Premium, Permatex, and DriveWorks. 2003 GMC Sierra 2500 Cooling and Climate Controls start as low as $1.29!

One of the best ways to find top quality OEM or aftermarket Cooling and Climate Controls is by asking professionals. Short of that, you can shop with confidence thanks to our 2,762 extensive product reviews on 2003 GMC Sierra 2500 Cooling and Climate Controls. Some of the top-rated Cooling and Climate Controls products we carry are Engine Cooling Fan Clutch: Reverse Rotation Severe Duty Thermal Clutch with 4.4 stars and Engine Water Pump Gasket with 4.7 stars.

Did we mention you can order your Cooling and Climate Controls from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Cooling and Climate Controls inventory for your 2003 GMC Sierra 2500 below to get started!

Top-Rated Cooling and Climate Controls Brands For Your 2003 GMC Sierra 2500

Trusted Cooling and Climate Controls OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 2003 GMC Sierra 2500 running right for years to come. In our inventory you’ll find brands like Carquest Premium, Permatex, DriveWorks, and even more.

Popular ACDelco Cooling and Climate Controls

You’ll find popular ACDelco brand products across Blend Doors and Air Conditioning Parts. All are waiting to get your 2003 GMC Sierra 2500 back on the road. Some of the top-rated ACDelco products in these categories are:
HVAC Blend Door Actuator: 1 Piece
from $251.99
(1)
HVAC Blend Door Actuator: 1 Piece
Air Blend Door Actuators
Multi-Purpose Pigtail
from $37.99
(2)
Multi-Purpose Pigtail
AC Clutch Coil Connectors
Heating and Air Conditioning Panel Mode Door Actuator
from $77.99
(1)
Heating and Air Conditioning Panel Mode Door Actuator
Heater Blend Doors

Top-Rated Carquest Premium Cooling and Climate Controls


If Carquest Premium are what you’re looking for, our inventory holds plenty. We stock Carquest Premium brand Cooling and Climate Controls for your 2003 GMC Sierra 2500, and some of our most reviewed Carquest Premium parts include:
Engine Water Pump: New, Gasket/Seals Included
from $153.99
(371)
Engine Water Pump: New, Gasket/Seals Included
Water Pumps
Standard Thermostat: With Seal, 187 Degrees
from $18.79
(189)
Standard Thermostat: With Seal, 187 Degrees
Thermostats
Integrated Thermostat Housing: With Seal, 187 Degrees
from $23.49
(173)
Integrated Thermostat Housing: With Seal, 187 Degrees
Thermostat and Water Outlet Assemblies

FAQs for 2003 GMC Sierra 2500 Cooling and Climate Controls

What are the most purchased Cooling and Climate Controls for the 2003 GMC Sierra 2500?

Out of 206 Cooling and Climate Controls for the 2003 GMC Sierra 2500, the most popular in our inventory are:
Water Pump & Thermostat RTV Silicone Gasket Maker, 0.5 OZ
from $6.99
(288)
Water Pump & Thermostat RTV Silicone Gasket Maker, 0.5 OZ
Engine Water Pump Inlet Pipe Gaskets
Engine Water Pump
from $101.99
(345)
Engine Water Pump
Water Pumps
Sensor-Safe, High-Torque RTV Silicone Gasket Maker
from $11.49
(95)
Sensor-Safe, High-Torque RTV Silicone Gasket Maker
Water Pump Housing Gaskets

What are the top-rated 2003 GMC Sierra 2500 Cooling and Climate Controls?

Top-rated Cooling and Climate Controls for your 2003 GMC Sierra 2500 based on customer reviews/ratings are:
Engine Cooling Fan Clutch: Reverse Rotation Severe Duty Thermal Clutch
from $95.99
(129)
Engine Cooling Fan Clutch: Reverse Rotation Severe Duty Thermal Clutch
“Good value and perfect replacement part”
Engine Water Pump Gasket
from $6.49
(100)
Engine Water Pump Gasket
“Great product …easy to use”
A/C Dark Grey Porous Orifice Tube
from $15.99
(97)
A/C Dark Grey Porous Orifice Tube
“Picture says it all – the 12-yr old tube was pretty filthy and not reusable. If you’re working on your A/C, this is a good item to replace while you'”