2003 Hummer H2 Engine Cooling Parts

Name: Electric Fan, 12" Diameter
Brand: Imperial
SKU: 226112
Price: 108.99 USD
Rating: 3.5 (38 reviews)

Keep Your 2003 Hummer H2 in Top Shape with Quality Engine Cooling Parts

Whether you’re repairing or upgrading your Engine Cooling Part, using high-quality parts is key to keeping your 2003 Hummer H2 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Thermostat and Water Outlet Gaskets, Water Pumps, and Thermostats. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Engine Cooling Parts from Trusted Brands

Looking for a reliable Engine Cooling Part? We’ve got you covered with options from brands you know and trust like Dorman, Carquest Premium, and FELPRO. For example, Dorman Engine Cooling Parts start at just $5.49 with an average 4.2 star rating. Carquest Premium and FELPRO offer similar pricing and quality, backed by strong customer feedback. With over 1,747 reviews and a solid 4 star average, you can shop with confidence knowing other Hummer H2 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2003 Hummer H2 Engine Cooling Part at Advance Auto Parts is around $66.57, with a range that starts at $4.79 and goes up to $327.99. With 44 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Engine Water Pump, Radiator: With Transmission Oil Cooler, and Engine Water Pump Gasket start at just $7.49 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Cooling Part, don’t forget to check out other key components like Blower Motor and Related Products and HVAC Electrical Parts. At Advance Auto Parts, we’re here to help you keep your 2003 Hummer H2 in peak condition, inside and out.

Looking for the perfect Engine Cooling Part for your 2003 Hummer H2? You’re in the right place. Below, you’ll find links to various types of Engine Cooling Parts that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Cooling Parts, ensuring durability and a precise fit for your Hummer H2. Whether you’re driving a 2003 model or another popular model year like 2004, 2005, 2006, 2007, 2008, and 2009, we’ve got you covered. Purchasing Engine Cooling Parts from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Engine Cooling Parts that fit your vehicle.

Essential 2003 Hummer H2 Engine Cooling Parts

from

$108.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Rapid-Cool Thin-Line electric fans
12″ Diameter
800 CFM
Use as a pusher or puller fan
Motors built and tested to quality specifications
12 in. universal fit reversible fan
800 CFM
UNIVERSAL fan, NOT a direct OE replacement. Measure core and verify space.

from

$60.99

UltraStat Thermostats are the toughest thermostats on the market. All heavy gauge stainless steel construction provides long-life durability, as well as complete corrosion resitance. Exclusive BLVT Valve technology minimizes thermal shock to cooling system components.

Product Features:

Heavy gauge stainless steel components offer increased reliability and long-lasting durability
Exclusive BLVT Valve Technology minimizes thermal shock to cooling system components
Stainless steel thermal element for unmatched corrosion resistance and revolutionary REAX wax mixture provides quicker reaction time
AccuSpring Design for stable temperature control and increased cabin comfort

from

$95.99

Product Features:

Designed, tested, and built by application
OE performance, fit, and appearance
Precision machined
Out of box installation

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$7.49

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
Manufactured for the sealing repair environment
Validated for fit, form, and function
Quality that you can trust

from

$23.79

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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$4.79

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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$9.99

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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$75.99

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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$23.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Economy adjustable thermostatic fan control
Economy Model; 32-248 Deg. F
For use with Imperial electric fans
Probe installs into radiator fins
Contains gaskets, O-rings, or seals to properly replace the product
Brass construction for accurate temperature sensing
Zinc coated terminal to resist corrosion
Vehicle specific applications

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$16.05

BWD is an aftermarket leader, providing a premium line of engine management products. BWD manufactures and distributes high technology critical components for late model domestic and import vehicles. BWD is constantly evolving to give customers the competitive edge they need to compete in today’s ever-changing marketplace.

Product Features:

Our knock sensors are designed to respond to knock frequencies up to 1000 Hz accommodating shifts in engine knock frequency making it a more flexible sensor responding to correct engine knock over a broad range of vehicle conditions
Manufacturing processes include an automated data acquisition system to continuously monitor the sensor output to ensure that it responds with appropriate voltage output at the specified frequency range
All units are 100% tested using an accelerometer vibration test to ensure trouble-free operation
Featuring the broadest sensor coverage in the market, we meet the service professionals needs with the highest quality product every time he opens the box
BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product

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$5.49

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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$151.99

Carquest Premium water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, hub, bearings, gaskets and seals are designed for long-lasting service life. These water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:

100% tested for reliable performance
Durable housing features precisely machined mounting surface for proper sealing and fitment
Equipped with weep chamber or similar feature to help prevent unnecessary replacement
Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
All gaskets or seals necessary for water pump are included
This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components

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$153.99

Using advanced re-engineering materials and processes, our remanufactured water pumps match O.E. fit and performance. Each unit is supplied with new, unitized seals and the proper O.E.-specified bearing design to meet the specific radial and axial load.

Product Features:

100% leak testing and hub-pull testing ensures reliable performance.
O.E.-supplied NEW unitized seals ensure long-lasting, trouble-free performance.
The proper O.E. specified bearing design is installed to meet the specific radial and axial load requirements of each application. This ensures longer bearing life and reliable performance.
Thermostat seal and mounting gasket are supplied for ease of installation (where applicable).

from

$7.49

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
Manufactured for the sealing repair environment
Validated for fit, form, and function
Quality that you can trust

from

$86.99

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

from

$93.99

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

from

$58.99

Kit includes thermostat, housing, and all necessary seals/gaskets to do the complete job. These individual parts are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat and housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

High grade stainless steel and copper construction
Meets or exceeds OEM standards
Consistent and precise response to cooling system needs
Original equipment design for worry-free direct fit replacement
100% tested and calibrated

from

$33.99

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

from

$19.99

Product Features:

Designed to meet or exceed OE specifications for fit, form and function
100% factory resistance calibrated to ensure precision tolerances, resulting in extremely accurate temperature for optimal performance
OE precision matched thermistor ensuring Carquest sensors match OE output resistances across all temperature positions
O-rings, seals or thread sealant are included if required
Weather-tight connectors prevent leaks and corrosion for longer life
Extensive design validation testing and 100% end-of-line tested
Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413

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$40.99

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:

Delphi temperature sensors deliver accurate readings and optimal performance
Delphi’s one-piece design and automated production process eliminates internal connectors and failure points
Each sensor is electrically insulated to eliminate interference from other components in the vehicle
Delphi temperature sensors are impervious to electrical noise and interference

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$35.99

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

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)
Includes quality gasket or O-ringá to ensure proper seal (where applicable)
Coated with corrosion and rust inhibitor
100% leak tested
Direct-fit replacement for ease of installation
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

from

$95.99

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

from

$327.99

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)

from

$311.99

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)

from

$232.99

New Platinum Pro Radiator, 34 Inch Core With Engine And Transmission Oil Coolers

Product Features:

34 Inch Core With Engine Oil Cooler And TOC, Without Heavy Duty Cooling, Made Of Plastic and 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
Radiator Cap Not Included
Check Out The Large Selection Of Parts Available For Your Vehicle

Popular 2003 Hummer H2 Engine Cooling Parts Categories

Radiators

Water Pumps

Engine Cooling Fan Controllers

Radiator Fan Clutch

Thermostats

Radiator Fan Motors

Thermostat and Water Outlet Assemblies

Engine Coolant Air Bleed Pipes

Coolant Reservoirs

Coolant Temperature Sensors

Coolant Reservoir Caps

Engine Water Pump Gasket Kits

Water Pump Install. Kits

Thermostat Housings

Thermostat and Water Outlet Gaskets

Water Pump Gaskets

Radiator Drain Plugs

Coolant Fan Motor Connectors

Radiator Cap Adapters

Most Popular Thermostat and Water Outlet Gasket for 2003 Hummer H2s

Enhance your 2003 Hummer H2 with this popular Thermostat and Water Outlet Gasket we have in stock, for $4.79.

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from

$4.79

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

Best-Selling 2003 Hummer H2 Water Pumps

Upgrade your H2 with one of our 2 best-selling Water Pumps, earning an average 4.5 stars rating across 716 reviews.

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from

$151.99

100% tested for reliable performance
Durable housing features precisely machined mounting surface for proper sealing and fitment
Equipped with weep chamber or similar feature to help prevent unnecessary replacement
Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
All gaskets or seals necessary for water pump are included
This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components

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$104.99

This replacement engine water pump is leak and flow tested. Gaskets and seals are included where applicable.

Product Features:

This pump is used on accessory belt driven applications
Used mostly on models equipped with a fan clutch
It is highly recommended that the fan clutch be replaced with the water pump
All gaskets or seals necessary for installation are supplied with pump
Durable housing features precisely machined mounting surfaces for proper sealing

Top-Quality Thermostats for 2003 Hummer H2s

Choose a high-quality OEM or aftermarket Thermostat for Hummer H2s and enjoy top-notch performance from $17.49.

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from

$17.99

Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

High grade stainless steel and copper construction
Meets or exceeds OEM standards
Consistent and precise response to cooling system needs
Original equipment design for worry-free direct fit replacement
100% tested and calibrated

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$28.99

Heavy gauge stainless steel components offer increased reliability and long-lasting durability
Exclusive BLVT Valve Technology minimizes thermal shock to cooling system components
Stainless steel thermal element for unmatched corrosion resistance and revolutionary REAX wax mixture provides quicker reaction time
AccuSpring Design for stable temperature control and increased cabin comfort

from

$36.99

Designed to open at 180 degrees every time, regardless of engine rpm, and it’s high-flow design and brass and copper construction eliminate the damaging effects of cycling when you’re stuck in stop-and-go traffic. It includes the rubber gasket and has a pressure relief valve.

Product Features:

Opens sooner than stock at 180 degrees
High flow design for performance applications
Includes rubber o-ring seal/gasket
Incorporates pressure relief valve

from

$17.49

Manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

High grade stainless steel and copper construction
Meets or exceeds OEM standards
Consistent and precise response to cooling system needs
Original equipment design for worry-free direct fit replacement
100% tested and calibrated

Top Picks for 2003 Hummer H2 Thermostat and Water Outlet Assemblies

Invest in one of our 8 durable Thermostat and Water Outlet Assemblies for your 2003 Hummer, knowing you’re getting trusted brands and expert craftsmanship.

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$21.99

Carquest Premium Integrated Housing Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant as well as the design and function of the housing. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

High grade stainless steel and copper construction
Meets or exceeds OEM standards
Consistent and precise response to cooling system needs
Original equipment design for worry-free direct fit replacement
100% tested and calibrated

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$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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$58.99

High grade stainless steel and copper construction
Meets or exceeds OEM standards
Consistent and precise response to cooling system needs
Original equipment design for worry-free direct fit replacement
100% tested and calibrated

from

$41.99

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

from

$33.99

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

from

$74.99

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

from

$65.99

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

from

$54.99

Includes quality gasket to ensure proper seal

Top-Rated Radiators for 2003 Hummer H2s

Make a smart move for your 2003 Hummer H2 with products all priced from $278.99 to $327.99.

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from

$311.99

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)

from

$327.99

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)

17-1/4"W X 34"L X 1-1/4"D Core, Crossflow, Aluminum

from

$278.99

CSF Radiators are designed and built to High Performance Standards. Radiators are carefully engineered and Wind Tunnel Tested in laboratory for Cooling Performance Validation. We have over 10,000 different models of Radiators that we manufacture and supply for all the leading brands of vehicles on the road.

Product Features:

OEM Specified Plastic Tank-Aluminum Core Construction
Tanks Are Made From Virgin Grade Engineered Plastic Resins, Which Are Glass Filled For Added Strength And Durability
Gaskets Are Made From Special Grade EPDM Rubber To Withstand Extreme Temperatures Of Up To -120 Degrees Fahrenheit
Tubes Welded Type Or Latest Generation B-Tube Design
Fins High Performance Multi-Louvered Design OEM Spec
100 Percent Leak Tested Before Leaving Factory At 150 Percent Of Operating Pressure
High Performance Transmission Cooler With Special Built-In Turburlator, When Applicable
Drop-In Fit
All Components Are Installed, Torqued And Tested On Radiator During Assembly

Top-Rated Engine Cooling Part Brands For Your 2003 Hummer H2

When it comes to finding the perfect Engine Cooling Part for your 2003 Hummer H2, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 16 trusted brands. We carry the most popular Engine Cooling Part brands including FELPRO, Carquest Premium, and Dorman, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $4.79. Purchasing a Engine Cooling Part from us here at Advance Auto Parts is a smart move for both you and your 2003 Hummer H2, providing peace of mind with parts that meet or exceed OEM standards.

Popular FELPRO 2003 Hummer H2 Engine Cooling Parts

If you’re looking for a top-quality Engine Cooling Part for your 2003 Hummer H2, Advance Auto Parts has exactly what you need with our selection of FELPRO Engine Cooling Parts. We have 3 FELPRO Engine Cooling Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $4.79 and an average cost of $6.59, you’ll find the perfect Engine Cooling Part for your needs and budget. FELPRO Engine Cooling Parts for the 2003 Hummer H2 come highly rated, with over 129 customer reviews and an impressive average rating of 4.6 stars. Choosing a FELPRO Engine Cooling Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $7.49

(9)

Engine Water Pump Gasket Kit

“OEM Quality, no rtv needed to make these work which makes it so much faster if you need to replace the water pump again in the future.”

from $4.79

(20)

Engine Coolant Thermostat Gasket

“No leaks!”

from $7.49

(100)

Engine Water Pump Gasket

“Great product …easy to use”

Top-Quality Carquest Premium 2003 Hummer H2 Engine Cooling Parts

For those in search of a high-quality Engine Cooling Part for their 2003 Hummer H2, Advance Auto Parts offers a great selection of Carquest Premium Engine Cooling Parts. With 3 Carquest Premium Engine Cooling Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Engine Cooling Parts start at just $17.99, with an average price of $160.66, giving you a range of options to suit your budget. Backed by over 655 customer ratings and an average rating of 4.4 stars, Carquest Premium Engine Cooling Parts provide both reliability and excellent performance. Choosing a Carquest Premium Engine Cooling Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

from $311.99

(95)

Radiator: With Transmission Oil Cooler

“N/A”

from $151.99

(371)

Engine Water Pump: New, Gasket/Seals Included

“this was one of the easys’t waterpumps i have ever installed”

from $17.99

(189)

Standard Thermostat: With Seal, 187 Degrees

“Good”

FAQs for 2003 Hummer H2 Engine Cooling Parts

What are the best-selling Engine Cooling Parts for 2003 Hummer H2s?

Out of 44 Engine Cooling Parts that fit 2003 Hummer H2s, the following parts are the top sellers:

Engine Water Pump (20420611) – $104.99
Radiator: With Transmission Oil Cooler (19920405) – $311.99
Engine Water Pump Gasket (15780035) – $7.49

What’s the price range for 2003 Hummer H2 Engine Cooling Parts?

The prices of Engine Cooling Parts for the 2003 Hummer H2 range from $4.79 up to $327.99 for the most premium parts.

What is the average price of an Engine Cooling Part for a 2003 Hummer H2?

The average price for Engine Cooling Parts for the 2003 Hummer H2 is $66.57. Keep in mind the variety of part types within our Engine Cooling Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Cooling Parts for other Hummer H2 model years?

Yes, we carry Engine Cooling Parts for 5 model years of Hummer H2s between 2004 and 2009. The following model years are the most popular for Engine Cooling Part purchases: 2009, 2008, 2007, 2006, 2005, and 2004.

What are the cheapest Engine Cooling Parts for my 2003 Hummer H2?

The cheapest 2003 Hummer H2 Engine Cooling Parts we carry are:

Engine Coolant Thermostat Gasket (15780471) – $4.79
Radiator Drain Cocks (17190408) – $5.49
Engine Water Pump Gasket (15780035) – $7.49
Engine Water Pump Gasket Kit (11469097) – $7.49
Engine Water Pump Installation Kit (12547307) – $9.99

What are the top-rated Engine Cooling Parts that fit the 2003 Hummer H2?

Based on 1,747 reviews by customers, our 2003 Hummer H2 Engine Cooling Parts have an average customer rating of 4 stars. These are the highest-rated categories of Engine Cooling Parts for the 2003 Hummer H2 and their top-rated products:

Coolant Fan Motor Connectors
- A/C Compressor Connector (20974428) – $16.05
Engine Water Pump Gasket Kits
- Engine Water Pump Gasket Kit (11469097) – $7.49

What types of Engine Cooling Parts do you sell for my 2003 Hummer H2?

As of 11/2/25, these are some of the most in-demand types of Engine Cooling Parts for a 2003 Hummer H2:

Can I get help with 2003 Hummer H2 Engine Cooling Part orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Hummer Engine Cooling Parts and more.

What is your return policy for Hummer H2 Engine Cooling Parts?

Advance Auto Parts keeps returns simple. For new Hummer H2 Engine Cooling Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2003 Hummer H2 Engine Cooling Parts

Imperial – Electric Fan, 12" Diameter (Part No.226112)

Motorad UltraStats – UltraStat Thermostat – 187 Degrees (Part No.5523-187)

Carquest Premium – Engine Cooling Fan Clutch: Reverse Rotation Severe Duty Thermal Clutch (Part No.215158)

Felpro – Engine Water Pump Gasket Kit (Part No.ES 73010)

Dorman – HD Solutions – Engine Coolant Reservoir Cap: Twist, Plastic, 1 Pack (Part No.902-5601)

Felpro – Engine Coolant Thermostat Gasket (Part No.35632)

Victor Reinz – Engine Water Pump Installation Kit (Part No.18-10020-01)

Dorman – Pressurized Coolant Reservoir: Clear, Plastic, Original Equipment Replacement (Part No.603-102)

Imperial – Adjustable Thermostatic Fan Control (Part No.226203)

Carquest – A/C Compressor Connector (Part No.PT770)

Dorman – Help – Radiator Drain Cocks (Part No.61136)

Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T7052)

Driveworks Water Pumps – Water Pump (Part No.58-653)

Felpro – Engine Water Pump Gasket (Part No.35635)

Dorman – Engine Heater Hose Assembly (Part No.626-543)

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

Motorad – Engine Coolant Thermostat Housing Assembly Thermostat: With Inlet, With Seal, 187 Degrees (Part No.524KT)

Dorman – Thermostat Assembly: Includes Housing, Thermostat, and Gasket, 186 Degrees (Part No.902-700)

Carquest Premium – Coolant Temperature Sensor 1TS1001 (Part No.WTC1002)

Delphi – Engine Coolant Temperature Sensor (Part No.TS10076)

Dorman – Coolant Housing/Water Outlet: with Housing, 30 Degree Neck Angle (Part No.902-836)

Carquest Premium – Engine Coolant Thermostat Housing (Part No.85254)

Carquest Premium – Radiator Cap Tester Adapter (Part No.12033)

Carquest Premium – Radiator: With Engine and Transmission Oil Coolers (Part No.432306)

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432298)

KAI – Radiator (Part No.RAD13029)

Felpro – Engine Coolant Thermostat Gasket (Part No.35632)

Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T7052)

Driveworks Water Pumps – Engine Water Pump (Part No.58-562)

Carquest Premium – Standard Thermostat: With Seal, 187 Degrees (Part No.14948)

Motorad UltraStats – Thermostat: With Seal, 187 Degrees (Part No.5456-187)

Mr. Gasket – Tstat (Part No.6368)

Motorad – Standard Thermostat: With Seal, 187 Degrees (Part No.524-190)

Carquest Premium – Integrated Thermostat Housing: With Seal, 187 Degrees (Part No.14298)

GM Genuine Parts – Engine Coolant Thermostat Water Inlet Assembly (Part No.15-10412)

Motorad – Engine Coolant Thermostat Housing Assembly Thermostat: With Inlet, With Seal, 187 Degrees (Part No.524KT)

Dorman – Thermostat Assembly: Includes Housing, Thermostat, and O-Ring, 180 Degrees (Part No.902-2700)

Dorman – Thermostat Assembly: Includes Housing, Thermostat, and Gasket, 186 Degrees (Part No.902-700)

Dorman – Thermostat Assembly: Includes Housing (Part No.902-2836)

Dorman – Thermostat Assembly: Includes Housing and O-Ring, 160 Degrees (Part No.902-2701)

Factory Air – Water Outlet with Thermostat (Part No.85580)

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432298)

Carquest Premium – Radiator: With Engine and Transmission Oil Coolers (Part No.432306)

CSF Cooling – 17-1/4"W X 34"L X 1-1/4"D Core, Crossflow, Aluminum (Part No.3728)