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HUMMER Cooling & Heating

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Summit Racing™ Thermostats

Summit Racing offers replacement thermostats for thousands of vehicles. They're offered in a variety of styles, materials, flow rates, temperature ratings, and more. A reliable thermostat is essential to your cooling system and overall performance—kicking in precisely when your engine needs it. Order the model best suited for your application.

4.28 out of 5 stars ( 361 )

$30.99

$49.99

On Sale

Mr. Gasket LS Thermostats

Mr. Gasket offers these high-quality thermostats for GM LS series automobile and light truck engines that utilize a separate thermostat and water neck. They're available in 160 and 180 degree temperatures to suit your engine application.

4.12 out of 5 stars ( 25 )

$37.66


$33.89

Lingenfelter Performance Engineering Thermostats

Lingenfelter Performance Engineering offers premium-quality thermostats for several applications. They're all direct drop-ins with no modifications needed and each includes the rubber seal. Reduce coolant temperature, produce more horsepower, and improve performance with Lingenfelter Performance Engineering thermostats.

3.93 out of 5 stars ( 142 )

$28.45

ACDelco GM Genuine Parts Water Necks and Thermostat Housings

ACDelco water necks and thermostat housings fit your vehicle just like the originals. When you need to restore the efficiency of your water inlet/thermostat housing, these quality replacements fix your issues with leak-free performance and peace of mind. The units are available in a variety of configurations for applications from the 1960s and up. You can be assured that not only the fit, but also the function will be just as expected. Replace your water necks with one of the same from ACDelco.

4.63 out of 5 stars ( 32 )

$40.99

ACDelco GM Genuine Parts Engine Coolant Thermostats

ACDelco GM Genuine Parts engine coolant thermostats monitor the flow of coolant through your vehicle's engine and radiator. Built to the exact specification of your original component, these are the only GM-recommended replacements. Do not settle for anything less than the best; choose ACDelco GM Genuine Parts.

4.46 out of 5 stars ( 37 )

$32.99

ACDelco Engine Coolant Thermostat Housings

ACDelco engine coolant thermostat housings are GM-recommended replacements for your vehicle's worn or damaged original equipment. The inline housing holds the thermostat and serves as a connection point for the radiator hose and inlet or outlet, and may also include ports for sensors or switches. These high-quality replacements are manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life that you expect from General Motors.

4.6 out of 5 stars ( 5 )

$37.99

ACDelco GM Genuine Parts Air Conditioning Replacement Parts

To help keep you cool in hot weather driving, ACDelco offers GM Genuine Parts air conditioning replacement parts. Built to fit nearly all GM vehicles on the road today, they include a complete range of components from accumulators, receiver driers, blower motors, compressors, condensers, filter, evaporators, and engine fan cooling motors. On a hot day, there is nothing like a rush of cold air. Make sure that refreshing air keeps flowing, even on the hottest of days, with ACDelco GM Genuine Parts.

5.0 out of 5 stars ( 3 )

$49.99

MotoRad Spec-R Racing Thermostats

In racing, precision is everything--from the driver's skill to each component under the hood. A racing engine thermostat isn't just about maintaining a lower temperature; it must endure the relentless demands of high-flow, high-pressure environments that standard parts simply can't handle. MotoRad Spec-R racing thermostats are engineered to offer rapid response and precise temperature control under extreme conditions, allowing optimal engine performance without compromise. They are manufactured to provide durability, withstand intense vibrations, and maintain reliability at every stage, ensuring that racers get consistent performance, lap after lap. Run your vehicle with maximum cooling efficiency; select the Spec-R racing thermostat best suited to your vehicle's needs. Features: * Black oxide coating for high temperature tolerance, corrosion resistance and life-long durability * Lower than OE opening temperature for cooler engine operation, resulting in more power * Specially formulated Spec R heat element mixture for faster response time * Proprietary gasket composition to withstand high-pressure/high performance cooling systems Note: Gaskets/seals may or may not be included.

5.0 out of 5 stars ( 1 )

$23.99

$36.85

MotoRad Spec-R Integrated Thermostat Housings

MotoRad Spec-R️ integrated housing thermostats are perfect for high performance and racing applications. Designed and manufactured by a leading OE thermostat supplier to withstand high-pressure and high-horsepower demands, they are made with quality materials and carry the Spec-R logo. Keep your vehicle running at maximum cooling efficiency, whether on the track or on the street; select the Spec-R thermostat with integrated housing best suited to your vehicle's needs. Features: * Black oxide coating for high temperature tolerance, corrosion resistance and life-long durability * Lower than OE opening temperature for cooler engine operation, resulting in more power * Specially formulated Spec R heat element mixture for faster response time * Proprietary gasket composition to withstand high-pressure/high performance cooling systems

Not Yet Reviewed

$45.18

Reach Cooling Heater Cores

REACH Cooling is a global leader in the manufacture and distribution of aftermarket cooling products for automotive, heavy truck, and industrial applications. Their wide product range covers more than 95 percent of popular automotive and light trucks. REACH offers aluminum heater cores in a variety of sizes, finishes, and inlet/outlet options. Order the OE-style replacement model recommended for your vehicle.

3.0 out of 5 stars ( 4 )

$42.99

Dorman Air Door Actuators

Is the heat or air conditioning only working on one side of your vehicle? Is the defrost not working at all? Dorman can help with these replacement air door actuators. Their redesigned housing will last longer than the factory units and will give you years of trouble-free service.

3.94 out of 5 stars ( 16 )

$39.95

ACDelco Mechanical Water Pumps

ACDelco mechanical pumps are ideal replacement components for many vehicles on the road today. They're manufactured to meet and exceed OE specifications for fit and performance. The pumps are available in many styles, materials, and other options. Order the model recommended for your application. Features and benefits include: * Available for practically all GM vehicles as well as a wide range of non-GM vehicles * Completely pressure-tested for reliable, leak-free performance * Coated seals support seal longevity and durability * Heat-treated shaft assemblies and impellers provide superior strength and durability * High-quality bearings are permanently sealed and lubricated for greater durability and long life * Uniform wall sections and smooth coolant-flow cavities for efficient operation * Cast iron, aluminum, or steel design, depending on vehicle

4.71 out of 5 stars ( 461 )

$47.99

MotoRad Ignition Coils

MotoRad ignition coils are engineered to maximize spark voltage duration for optimal engine performance. They're designed to perform under severe operating conditions and protect against extreme heat. All coils meet or exceed OEM specifications. Order the replacement ignition coils recommended for your vehicle. Additional product details: * Heat-resistant magnet produces max voltage output at all engine speeds * Graphite-infused platinum connections resist corrosion and offer superior conductivity and durability * Primary and secondary windings made with ETP-grade copper provide superior temperature protection and voltage conductivity * Pre-applied dielectric grease for easy installation

Not Yet Reviewed

$26.99

Four Seasons Deslugger Compressor Clutch Timers

Four Seasons Deslugger compressor clutch timers extend A/C compressor life by eliminating liquid slugging. Low mounted compressors collect oil and liquid refrigerant when a vehicle sits. The result can be hydraulic lock with catastrophic damage on initial compressor engagement. These clutch timers solve the liquid slugging problem by pulsing the compressor clutch multiple times during initial engagement. By gradually engaging the compressor, trapped liquid is gently moved out. Once the brief deslugging function is complete, the compressor reverts back to normal cycling operation.

1.0 out of 5 stars ( 1 )

$46.99

Dorman Mechanical Fans

Dorman mechanical fans are just what you need to keep your ride cool. So, if your stock fan has given up the ghost, replace it with quality components by Dorman to restore proper function.

4.26 out of 5 stars ( 34 )

$41.99

Four Seasons Air Conditioning Installer Kits

Four Seasons offers air conditioning installer kits for a variety of vehicles. The components are engineered and tested to provide years of trouble-free operation. All components are designed to meet or exceed OE specifications for fit and performance with precision-machined fittings and connections to ensure system sealing. All required gaskets and seals are included, as well as the OE-specified system lubricant. Backed by over 50 years of mobile A/C experience, fix it once and fix it right with the Four Seasons air conditioning installer kit best suited for your application.

5.0 out of 5 stars ( 1 )

$33.99

Universal Air Conditioner Pressure Switches

The pressure switch controls the on/off function of the A/C compressor, the unit that pumps refrigerant through the system. You can make sure you stay cool by replacing failing switches with a new one from UAC. Universal Air Conditioner pressure switches will maintain the proper operation of your air conditioning system to keep producing cold air.

4.0 out of 5 stars ( 3 )

$23.99

Flex-A-Lite Billet Aluminum Radiator Caps

A Flex-A-Lite billet aluminum radiator cap will make a beautiful upgrade under the hood. These caps are rated at 22 psi and fit nearly all factory and aftermarket radiators from 1973 until the present.

4.0 out of 5 stars ( 1 )

$26.99

National Bearing Air Conditioning Compressor Clutch Bearings

Is that A/C compressor clutch bearing making some odd noises under your hood? If so, replace it with one of these National Bearing air conditioning compressor clutch bearings. These bearings are precision-machined and designed for a variety of applications. Made to meet or exceed OEM specifications, these National Bearing air conditioning compressor clutch bearings are sure to get your A/C compressor functioning properly again.

Not Yet Reviewed

$33.99

Agility Auto Parts Heater Cores

Agility Auto Parts offers a complete line of automotive heater cores, covering 94 percent of all North American vehicle. They provide value in several ways, including increased thermal performance and resistance to corrosion. The HVAC cores use enhanced design features, such as the latest fin and tube technology and design standardization for maximum availability. These certified heaters meet or exceed OE specifications—and are "drop in fitment" checked in the actual vehicles HVAC heater module, so they're ready to be installed right out of the box. Agility Auto Parts heaters are engineered and manufactured under ISO TS16949 quality systems and are 100 percent leak-tested.

3.76 out of 5 stars ( 17 )

$45.99

Mahle Original Cabin Air Filters

Mahle Original cabin air filters come in many styles, in different media material, each one designed to capture airborne contaminants such as dirt, pollen, and other pollutants that enter your vehicle's interior via the heating, air conditioning, and defrosting systems. These cabin air filters can also reduce the load on the blower, protect heating and air conditioning from contamination, and improve air circulation, and prevent dangerous fogging of the windows. The recommended filter replacement interval is typically every 15,000 to 30,000 miles for dust-type filters, or once a year for combination dust and odor cabin air filters. Clean air is always in season! Order the Mahle cabin air filter designated to fit your vehicle.

3.0 out of 5 stars ( 2 )

$23.99

OSC Automotive Heater Cores

OSC Automotive heater cores are designed to OE form and function. These technically advanced cores are made from premium-grade aluminum and are direct replacements for copper units. The tubes are cadmium plated inside and out to prevent premature failure. Each heater core is individually pressure-tested. All necessary foam and accessories are included in each unit. Order the model designed to fit your application.

5.0 out of 5 stars ( 1 )

$47.99

Universal Air Conditioner Air Conditioning Repair Kits

Universal Air Conditioner offers a comprehensive line of mobile climate-control products, including air conditioning repair kits that will help you to restore your vehicle's A/C system back to its proper operation. Choose the UAC air conditioning repair kit designed for your specific application needs.

Not Yet Reviewed

$32.99

$46.99

Universal Air Conditioner Blower Motor Resistors

Universal Air Conditioner blower motor resistors will restore your control to regulate motor speed, allowing you to enjoy perfect comfort in your car. They are economical, quality-made components that are built to last. Choose the one designed for your vehicle.

Not Yet Reviewed

$20.99