2003 GMC Sierra 2500 HD Engine Cooling Parts

Essential 2003 GMC Sierra 2500 HD Engine Cooling Parts

GMB – GMB Water Pump (Part No.G3000395001GMB)

GMB Water Pump

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$162.36
The GMB Water Pump contains no remanufactured components and is designed to combat engine overheating associated with higher RPM, performance and high load applications. All GMB Water Pumps feature a precision ground, heavy duty steel bearing that`s completely sealed and lubricated for life. A specially modified, high performance impeller eliminates cavitation at high RPM`s, maintaining maximum volumetric flow of coolant, thus reducing engine temperature and increasing horsepower.

Product Features:
  • OE-Equivalent and direct fit application.
  • 100% new with no remanufactured parts.
  • High flow design
  • Factory lubricated bearing assembly
  • Precision ground shaft and hub
  • OE quality forged housing for maximum coolant flow
  • Precision built and balanced
  • Pressed on impeller for increased water flow
  • Unique no sealed required gasket
  • Unitized seal protects bearings and provides long life leak free performance.
  • Factory sealed precision ground one piece bearing assembly
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Dorman – Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (Part No.799-105)

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

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$5.29
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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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

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$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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Permatex – The Right Stuff: 1 Minute Gasket Maker: Grey, 3 OZ (Part No.25238)

The Right Stuff: 1 Minute Gasket Maker: Grey, 3 OZ

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$19.99
Permatex’s The Right Stuff 1 Minute Series offers the fastest return to service in just 1 minute! This leak-proof, elastomeric “Formed-in-place” material is more reliable and longer lasting than pre-cut gaskets. It is blowout resistant and protects against leaks and seepage caused by vibration and thermal expansion. The Right Stuff 1 Minute Grey is specified for high torque and high vibration applications and is formulated to meet or exceed performance standards for long-term sealability, durability and handling.

Product Features:
  • Designed to perform under higher torque loads associated with engines having closely spaced bolt patterns
  • Sensor-safe, non-corrosive, RTV silicone
  • Protects against leaks caused by vibration and thermal expansion
  • Meets performance specs of OE silicone gaskets
  • Quickly returns vehicle to service in just 1 minute
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Carquest Premium – Radiator: With Engine And Transmission Oil Coolers (Part No.432333)

Radiator: With Engine And Transmission Oil Coolers

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$589.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineered with integrated ribbing for added strength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
  • Oil cooler designs meet or exceed OE standards, keeping the vehicle’s engine and transmission performing at optimal conditions
  • OEM grade, premium fittings for transmission or engine oil coolers (where applicable)
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ACDelco – GM Original Equipment Expansion Tank Cap (Part No.G1040206092ACD)

GM Original Equipment Expansion Tank Cap

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$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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Dorman – Engine Heater Hose Assembly (Part No.626-591)

Engine Heater Hose Assembly

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$89.99
This replacement engine coolant pipe assembly is designed to match the fit and function of the original assembly on specified makes, years and models, and is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this replacement engine coolant pipe assembly is designed to match the fit and function of the original assembly on specified makes, years and models
  • Restores functionality – reliable replacement for an original part that is leaking, cracked or failed from corrosion and heat
  • 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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ACDelco – 12587397 GM Original Equipment Engine Coolant Water Inlet Seal (Part No.G4030310258ACD)

12587397 GM Original Equipment Engine Coolant Water Inlet Seal

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$8.72
An ACDelco GM Original Equipment Engine Coolant Water Inlet Seal is a GM-recommended replacement for your vehicle’s original component. It seals and helps prevent coolant from leaking out of cooling system components. This original equipment engine coolant water inlet seal has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Seals and helps prevent coolant from leaking out of cooling system components to maintain the proper engine temperature
  • 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 – Radiator Cap Tester Adapter (Part No.12033)

Radiator Cap Tester Adapter

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$93.99
Tester adapter for the MT-300 cooling system pressure testers. Professional grade test equipment to ensure an automotive cooling system is operating at the correct pressure. Made from high quality materials to ensure durability. Designed to test automotive coolant caps.

Product Features:
  • Machined metal construction
  • Works with MT-300 pressure tester
  • Tests coolant caps
  • Professional quality
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Dorman – Thermostat Assembly: Includes Housing, Thermostat, and O-Ring, 180 Degrees (Part No.902-2700)

Thermostat Assembly: Includes Housing, Thermostat, and O-Ring, 180 Degrees

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$107.99
This replacement engine coolant thermostat housing assembly is engineered to match the fit and durability of the stock housing assembly on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

Product Features:
  • Ideal replacement – this engine coolant thermostat housing assembly directly replaces the original water outlet on specified vehicle years, makes and models
  • Durable construction – this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
  • Cost-effective and reliable – offers original manufacturer quality at lower cost than getting replacement at dealer
  • Industry-leading design – professionally engineered by the aftermarket leader in replacement thermostat housing assemblies
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Dorman – Coolant Housing/Water Outlet: With Housing, 30 Degree Neck Angle (Part No.902-836)

Coolant Housing/Water Outlet: With Housing, 30 Degree Neck Angle

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$35.49
This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

Product Features:
  • Ideal replacement – this engine coolant thermostat housing directly replaces the original housing on specified vehicle years, makes and models
  • Durable construction – this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
  • Cost-effective and reliable – offers original manufacturer quality at lower cost than getting replacement at dealer
  • Industry-leading design – professionally engineered by the aftermarket leader in replacement thermostat housings
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Carquest Premium – Radiator Cap: 20 PSI (Part No.10271)

Radiator Cap: 20 PSI

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$19.79
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
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Carquest Premium – Coolant Housing/Water Outlet (Part No.85253)

Coolant Housing/Water Outlet

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$73.99
We are proud to offer this CARQUEST product line: CARQUEST Water Outlets. Our products are engineered and tested to provide years of trouble free operation and designed to be hassle free OE replacement part that meets and/or exceeds OE standards. Backed by over 50 years of mobile temperature control experience, fix it once and fix it right with CARQUST Water Outlets and Thermostat Housings.

Product Features:
  • Meets and/or exceeds OEM standard
  • Direct-fit replacement for ease of installation
  • Coated with corrosion and rust inhibitor
  • 100% leak tested
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Dorman – Radiator Drain Petcocks (Part No.G10051333557DOR)

Radiator Drain Petcocks

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$5.73
Dorman offers a variety of Radiator Drain Petcocks for a range of applications. The high-quality design ensures effective draining of the cooling system. Features and Benefits

Product Features:
  • Available in several styles, including standard, screw-in, and push-in with captive thread
  • Direct replacement Radiator Drain Petcocks available (where applicable) to ensure a proper fit
  • Durably engineered for a long service life
  • Easy to use, no need to disconnect any of the radiator hoses
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Victor Reinz – Engine Water Pump Installation Kit (Part No.18-10020-01)

Engine Water Pump Installation Kit

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$9.49
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
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ACDelco – GM Original Equipment Engine Coolant Thermostat (Part No.G4000310418ACD)

GM Original Equipment Engine Coolant Thermostat

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$62.94
An ACDelco GM Original Equipment Engine Coolant Thermostat is a temperature controlled valve located in the engine coolant outlet to, or the inlet from, the radiator, and is a GM-recommended replacement for your vehicle’s original component. It controls the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature. This original equipment engine coolant thermostat has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:
  • Control the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature
  • 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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Dorman – Panel Trim Retainer – Interior – Ford (sold by each) (Part No.700-398)

Panel Trim Retainer - Interior - Ford (sold by each)

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$1.29
All our Multi-Purpose Retainers are made of high quality materials for long-lasting durability. Offering a full line of Multi-Purpose Retainers for a wide range of applications.

Product Features:
  • Durable nylon design for a long service life
  • Also suitable for a broad variety of industrial and commercial uses
  • Conveniently packaged in a variety of piece counts
  • Direct replacement Retainers available (where applicable) to ensure a proper fit
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Felpro – Engine Coolant Thermostat Housing Gasket (Part No.35762)

Engine Coolant Thermostat Housing Gasket

from

$3.29
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Validated for fit, form, and function
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ACDelco – Water Pump Housing (Part No.G3030584361ACD)

Water Pump Housing

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$170.52
Water Pump Housing

Dorman – Clutch Fan Blade: Plastic, Cost Effective And Reliable (Part No.621-106)

Clutch Fan Blade: Plastic, Cost Effective And Reliable

from

$116.99
Replace your damaged cooling fan blade with this direct replacement. This vehicle-specific application is engineered for a perfect fit and is made from quality materials to ensure durability and restore proper cooling system operation.

Product Features:
  • Direct replacement – this engine cooling fan blade fits and functions like the original equipment fan blade
  • Quality construction – manufactured from premium materials for a long service life
  • Excellent value – original equipment quality at a lower price
  • Quality tested – has undergone testing to ensure proper fit and performance
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Dorman – Thermostat Bypass Pipe (Part No.902-901)

Thermostat Bypass Pipe

from

$55.99
This thermostat bypass pipe is designed to match the fit and function of the original pipe on specified applications, and is engineered for reliable performance and durability.

Product Features:
  • Direct replacement – this thermostat bypass pipe is designed to match the fit and function of the original pipe on specified applications
  • Restores functionality – reliable replacement for an original part that is leaking or has failed due to corrosion
  • 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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KAI – Coolant Reservoir (Part No.GM3014115)

Coolant Reservoir

from

$44.99
New Platinum Pro Coolant Recovery Tank, Models With Gasoline Engine

Product Features:
  • Models With Gasoline Engine, Made Of Plastic
  • 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 – 15-80692 GM Original Equipment Engine Cooling Fan Blade (Part No.G5050374437ACD)

15-80692 GM Original Equipment Engine Cooling Fan Blade

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$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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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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Felpro – Engine Water Pump Gasket (Part No.36109)

Engine Water Pump Gasket

from

$19.29
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
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US MOTOR WORKS – Water Pump with Fan Clutch (Part No.MCK1007)

Water Pump with Fan Clutch

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$158.99
US Motor Works Professional Series Water Pump with Fan Clutch are designed to replace the mechanical components of a cooling system. A proper water pump replacement should include a new fan clutch as the two are connected to the same shaft and work together to move the air and cooling fluid. Replacing one without the other can damage the new part and cause repeat work or engine trouble. This matched set will allow your vehicle continued operation in the demanding environment of today’s engine. All components are brand new and QA inspected for perfect fit and function. Restore your cooling power by installing a US Motor Works Professional Series Water Pump with Fan Clutch.

Product Features:
  • Fan clutch mounts to the water pump and should be replaced at the same time.
  • Matched set for proper water pump or fan clutch replacement
  • Includes mounting hardware, gaskets and accessories as required.
  • Complete mechanical cooling parts replacement
  • Factory tested and 100% new product
  • Meets or exceeds OEM quality
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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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Imperial – Thermostatic Fan Control – Adjustable (Part No.226208)

Thermostatic Fan Control - Adjustable

from

$62.99
Controls the operating temperature of Imperial electric fans. Operates up to 2 fans.

Product Features:
  • Adjustable thermostatic fan control
  • 160°F – 210°F thread-in probe
  • For use with Imperial electric fans
  • Thread-in probe for installation in water jacket or radiator
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2003 GMC Sierra 2500 HD Engine Cooling Parts

Maybe you’re in the middle of a full rebuild of that 2003 GMC Sierra 2500 HD. Maybe you just need a couple of Engine Cooling Parts. Either way, Advance Auto Parts has 123 different Engine Cooling Parts in our inventory ranging from $1.29 to $698.12. That means you can find the exact parts or products you need to keep that 2003 GMC Sierra 2500 HD running smoothly.

Engine Cooling Parts are only as good as their brand. We stock 20 different brands to make sure you have plenty of trusted parts to choose from for your 2003 GMC Sierra 2500 HD. Carquest Premium, Permatex, and Felpro are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Engine Cooling Parts for your 2003 GMC Sierra 2500 HD, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 20,672 reviews in this category, some of the top rated parts include Engine Cooling Fan Clutch: Reverse Rotation Severe Duty Thermal Clutch with 4.4 stars and Standard Thermostat: With Seal, 195 Degrees with 4.6 stars.

So if you’re in the market for aftermarket Engine Cooling Parts to keep your 2003 GMC Sierra 2500 HD rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Engine Cooling Parts Brands To Make Your 2003 GMC Sierra 2500 HD Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 2003 GMC Sierra 2500 HD demands trusted brand parts and products to keep it running. Many trusted brands of Engine Cooling Parts make up Advance Auto Parts’ inventory, and all are ready to help make your Sierra 2500 HD the best it can be. Be sure to browse some of our top Engine Cooling Parts brands and parts.

Popular ACDelco Engine Cooling Parts

We carry ACDelco parts in our stock across Coolant Temperature Sensors categories, plus more. For a 2003 GMC Sierra 2500 HD, our most popular ACDelco Engine Cooling Parts include:
Engine Coolant Temperature Sensor
from $34.99
(1)
Engine Coolant Temperature Sensor
Coolant Temperature Sensors

FAQs for 2003 GMC Sierra 2500 HD Engine Cooling Parts

What are the most purchased Engine Cooling Parts for the 2003 GMC Sierra 2500 HD?

Out of 123 Engine Cooling Parts for the 2003 GMC Sierra 2500 HD, 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 HD Engine Cooling Parts?

Top-rated Engine Cooling Parts for your 2003 GMC Sierra 2500 HD 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”
Standard Thermostat: With Seal, 195 Degrees
from $7.29
(105)
Standard Thermostat: With Seal, 195 Degrees
“Replaced my old one.. No problems”
Engine Water Pump Gasket
from $6.49
(100)
Engine Water Pump Gasket
“Great product …easy to use”