2003 Hummer H2 Cooling and Climate Controls

DENSO is a leading supplier of radiators to OE car makers around the world. Manufacturers rely on our quality and innovation to remain on the leading edge of engine cooling technology. Our OE experience and know-how ensure our products provide unmatched performance, reliability and fitment. Radiator performance is essential for proper engine cooling and function. DENSO’s radiator configurations, tanks, fin pitch, core dimensions and materials meet OE manufacturer’s rigid standards. All DENSO radiators pass our strict durability and function tests. As the result, our radiators deliver reliable performance even under the most demanding conditions. Radiator types: Plastic tank with aluminum core. Plastic tank with copper core. Cross-flow and down-flow configurations. DENSO is known for the unsurpassed quality of its products. Plastic, copper or aluminum components: it doesn’t matter. Our DENSO radiators are dependable, lightweight and made to last. An investment in a DENSO radiator will pay dividends in the long run. Radiators can fail causing leaks or inefficient cooling. This can lead to your engine to run hotter which in turn creates excess wear and tear on the engine. DENSO radiators are designed with our First Time Fit® philosophy in mind. You get radiators that drop in easily without the need for adjustment, brackets or modification of any kind. Our radiators are precision built to provide the right part, the right fit, the first time.

Product Features:

• Fin Pitch – Superior fin waves provide a higher heat transfer.
• Flow Configuration – Available in cross-flow and down-flow configurations.
• Aluminum or Copper Core – Thin-tube construction assures maximum cooling efficiency.

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

Product Features:

• High-quality products that meet OE appearance and performance to

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

Value-priced bearing meets all cataloged application requirements.

Product Features:

• Brand may vary by location

ACDelco Professional Temperature Control Relay is a high quality aftermarket replacement component for one or more of the following vehicle systems: HVAC. This premium aftermarket relay is manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:

• Professional, premium aftermarket replacement
• Provides the performance and dependability you expect from ACDelco
• Manufactured to meet expectations for fit, form, and function

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

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.

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

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

ACDelco GM Original Equipment HVAC Mode Door Actuators are electric motors attached to the HVAC housing that move or actuate the mode doors or flaps, directing the airflow to the desired outlet vents. These original equipment HVAC mode door actuators are GM-recommended replacements for your vehicle’s original components and have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

• Corrects mode door malfunction caused by a failed actuator
• 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

New Standard Replacement A/C Compressor, Denso, V8 Engine

Product Features:

• Denso, V8 Engine
• 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

GM Genuine Parts Cabin Air Temperature Sensor Aspirators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These cabin air temperature sensor aspirators are part of the interior cabin temperature sensing feature. The cab air temperature sensor aspirator may have a small fan, depending on application, to draw cabin air across the interior temperature sensor. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:

• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM 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

For more than a century, Delphi has been making the parts cars are born with – often developing new technologies in the process. Delphi is proud of its OE heritage, and over the years they’ve used that experience to expand into a global aftermarket supplier.

Product Features:

• Meets or exceeds OE specifications
• All Delphi evaporators undergo vibration, burst, corrosion and pressure cycle testing, as well as rigorous thermal and hydrodynamic performance tests for high quality
• Unique core design offers increased water shedding capability for improved performance.

Carquest New Compressors are designed, manufactured and tested to meet or exceed strict original equipment specifications for superior quality and performance. Each new compressor is tested to provide durable life to the vehicle’s air conditioning system. All new compressor components are assembled using state of the art equipment and techniques to ensure smooth operation. Each part is equipped with a clutch and connector that matches the original equipment part and provides an exact replacement to your vehicle’s part. All compressors are supplied with the necessary gaskets and o-rings for installation.

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.
• O-Rings and gaskets necessary for installation are included.
• Matched high-quality needle-roller bearing ensures low friction and high load capability.
• Light weight aluminum energy-saving casting used for construction.

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
• Vehicle specific applications

GM Genuine Parts A/C Orifice Tubes are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These tubes, which separate the high and low pressure sides of the air conditioning system, control the flow of low pressure liquid refrigerant into the evaporator. The orifice tube is essentially a calibrated restriction located at the inlet to the evaporator. This causes the necessary pressure drop to allow the liquid refrigerant to evaporate within the evaporator and absorb heat. Since the orifice tube is fixed, the system is regulated by either cycling the compressor clutch or by a variable displacement compressor. 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:

• Restores A/C performance due to restricted orifice tubes
• 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

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

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

Climate controls stopped working? Easily replace your unit with this brand new Dorman OE FIX HVAC control module assembled and tested in the USA. This unit contains proprietary software that eliminates the need for programming with GM-specific software like SPS (Service Programming System). Because of this, one OE FIX module fits a wide range of General Motors, Isuzu and Saab vehicles that have automatic air conditioning controls. After installation, the unit is automatically configured to the vehicle, making installation quick and easy.

Product Features:

• Easy installation – this climate control module features unique software that automatically configures the unit to the vehicle as soon as you plug it in, requiring no manual setup
• Assembled in America – this 100% new unit is finished and tested at an advanced facility in Pennsylvania to ensure stringent quality control
• Restores functionality – unit restores primary operations of original equipment (control functions on some models may vary from original)
• Seamless fit – unit is identical in appearance to the factory module, retaining original look and feel

These nuts are manufactured using durable materials and corrosion tested to ensure required strength and longevity.

Product Features:

• Durable materials – manufactured to specific thread tolerance standards
• Corrosion tested – hardware undergoes salt spray testing to ensure corrosion resistance
• Multipurpose usefulness – can be used in a variety of applications, from auto to home
• Trustworthy quality – backed by team of professional engineers and quality control specialists in the United States

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

Product Features:

• Preset thermostatic fan control
• 185°F preset
• For use with Imperial electric fans
• Probe installs into radiator fins

GM Genuine Parts Wiring Relays are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These relays help connect or disconnect power to a vehicle accessory when it receives a low voltage signal from a switch. 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 connect or disconnect power to vehicle accessories
• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
• GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
• GM regularly updates production and service part designs to integrate new materials and technologies

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
• Includes quality gasket or O-ring to ensure proper seal (where applicable)
• 100% leak tested
• Direct-fit replacement for ease of installation

Like all DENSO First Time Fit® A/C components, our condensers are designed and manufactured to integrate seamlessly with the vehicle’s original air conditioning system. DENSO condensers match up to OE condensers at every benchmark. Multiflow, subcooling, and the latest Ssrpentine condenser styles are offered to provide the optimum configuration for each application. Premium aluminum construction improves reliability, resisting corrosion to avoid expensive system leaks, while the superior fin wave design offers higher heat transfer and maximum refrigerant condensation. Heat exchanger cores are specially designed to shed airborne material buildup, allowing the A/C system to operate at peak efficiency with minimal maintenance, assuring years of trouble-free service.

Product Features:

• Zinc diffusion layer improves corrosion resistance
• Unique fin design to minimize airflow blockage
• High performance design reduces the required compressor power
• System Efficiency: Superior fin waves provide a higher heat transfer coefficient and full condensation.
• Engineered to Perfection: OE quality engineered for unparalleled performance
• Exact Fit: Condensers install with speed and ease
• Reduces required compressor power, resulting improved fuel economy
• Restores A/C performance to as-new condition
• First Time Fit® assures bolt-in replacement; no brackets or adapters
• Greater Durability: Pure aluminum construction provides greater resistance for corrosion

GM Genuine Parts A/C Clutch Cycle Switches are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These A/C clutch cycle switches are component sensors that monitor the evaporator temperature and pressure. The switch turns the compressor clutch field coil off and on. When the pressure and temperature are too low, the compressor is switched off. 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:

• Restores A/C compressor clutch function
• 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

A/C Pressure Switch

This A/C compressor clutch connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

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

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

Product Features:

• Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
• GM 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