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The Following brands are available based on your search.

  • ACDelco
    ACDelco
  • Dorman
    Dorman
  • Earl's Performance
    Earl's Performance
  • Four Seasons
    Four Seasons
  • Motorad
    Motorad
  • Proform
    Proform

Best Selling Genuine Hummer Coolant Thermostat Housings

  • We Stock the following top leading brands, including ACDelco, Four Seasons, Motorad, Dorman, Proform, Earl's Performance
  • Constantly Updated Inventory of Hummer Replacement Coolant Thermostat Housing Parts

We stock Coolant Thermostat Housing parts for most Hummer models, including H2, H3, H3T.


ACDelco
2008 Hummer H3 Engine Coolant Thermostat Housing 8 Cyl 5.3L ACDelco - Water Outlet

P311-3269184    W0133-1866065  New

Qty:
In Stock & Ready to Ship
$18.36
ACDelco Engine Coolant Thermostat Housing
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • Water Outlet
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2008 - Hummer H3 V 8 Cyl 5.3L 325 5328
Four Seasons
2003 Hummer H2 Engine Coolant Thermostat Housing Four Seasons - Thermostat Housing

P311-3317486    85254  New

01455196 , 11185254 , 12558838 , 12558853 , 12561157 , 12562740 , 12571261 , 1510412 , 379160 , 379187 , 6051813 , 815254 , 85254 , 9022701 , AO5156 , W5156 , W78064

Qty:
In Stock & Ready to Ship
$36.79
Four Seasons Engine Coolant Thermostat Housing
  • ; w/o Thermostat
  • Engine Coolant Thermostat Housing
  • Thermostat Housing
  • Product Attributes:
    • Bolt Hole Center To Bolt Hole Center: 3.000
    • Description: Engine Coolant Components
    • Flange Thickness: 0.395
    • Inlet Port Diameter: 1.307
    • Meets / Exceeds OEM?: Yes
    • Overall Height IN: 2.51
    • Style: W/o Thermostat
    • Thermostat Included?: Not Included
Brand: Four Seasons
Additional Fitment Information:
Vehicle
2003 - Hummer H2
Four Seasons
2007 Hummer H3 Engine Coolant Thermostat Housing Four Seasons - Thermostat Housing

P311-419DBB1    85948  New

12579956 , 12620113 , 12622316 , 1511073 , 34045 , 48718 , 538187 , 6052062 , 815766 , 85948 , 902847 , W98478

Qty:
In Stock & Ready to Ship
$32.72
Four Seasons Engine Coolant Thermostat Housing
  • Integrated Thermostat Housing
  • ; with Thermostat
  • Engine Coolant Integrated Thermostat Housing
  • Thermostat Housing
  • Product Attributes:
    • Description: Engine Coolant Components
    • Flange Thickness: 0.375
    • Inlet Port Diameter: 1.250
    • Meets / Exceeds OEM?: Yes
    • Outlet Port Diameter: 31.000
    • Overall Height IN: 5.750
    • Style: W/ Thermostat
    • Thermostat Included?: Included
Brand: Four Seasons
Additional Fitment Information:
Vehicle
2007 - Hummer H3
Four Seasons
2003 Hummer H2 Engine Coolant Thermostat Housing Four Seasons - Thermostat Housing

P311-0509F72    85580  New

12558838 , 12558853 , 12561157 , 12562740 , 12571261 , 14298 , 278213 , 33910 , 379160 , 379180 , 379187 , 6051897 , 60540261 , 815580 , 85580 , 9022700 , 9022701 , 902700 , CWK815580 , W78213 , W98231

Qty:
In Stock & Ready to Ship
$27.78
Four Seasons Engine Coolant Thermostat Housing
  • Integrated Thermostat Housing
  • ; with Thermostat with Thermostat
  • Engine Coolant Integrated Thermostat Housing
  • Thermostat Housing
  • Product Attributes:
    • Description: Engine Coolant Components
    • Flange Thickness: 0.403
    • Inlet Port Diameter: 1.222
    • Meets / Exceeds OEM?: Yes
    • Overall Height IN: 2.400
    • Style: W/ Thermostat
    • Thermostat Included?: Included
Brand: Four Seasons
Additional Fitment Information:
Vehicle
2003 - Hummer H2
Motorad
2006 Hummer H3 Engine Coolant Thermostat Housing 5 Cyl 3.5L Motorad

P311-5AEDD17    CH5096  New

15-1823 , 24576963 , 815582 , 85096 , 902-116 , 9CH5096 , CH5096 , CO34809

Qty:
In Stock & Ready to Ship
$16.79
Motorad Engine Coolant Thermostat Housing
  • Engine Coolant Water Outlet
  • Includes housing and seal
  • Product Attributes:
    • Bolts Included: No
    • Mounting Hole Quantity: 2
    • Outlet Diameter: 1.29 In
  • Manufactured to the highest OEM quality standards by an OE Supplier, using proprietary material to stand up to even the most demanding automotive cooling systems. Thermal shock validated and 100% leak tested
Brand: Motorad
Additional Fitment Information:
Vehicle Block Engine CID CC
2006 - Hummer H3 L 5 Cyl 3.5L 211 3460
Dorman
2003 Hummer H2 Engine Coolant Thermostat Housing - Upper 8 Cyl 6.0L Dorman

P311-5E0BB5F    902-836  New

12568911 , 12581594 , 12600172 , 34702 , 524KT , 6261 , 6261-T , 8125689110 , 8125815940 , 8126001720 , 815665 , 85083 , CH2836

Qty:
In Stock & Ready to Ship
$21.24
Dorman Engine Coolant Thermostat Housing Upper
  • Engine Coolant Thermostat Housing
  • wo/Water Pump Casting No. 12562459 Does Not Include Thermostat Use If Original Water Pump Replaced with Later Design Cover
  • Product Attributes:
    • Air Vent (Bleeder Valve): No
    • Bolts Included: No
    • Housing Neck Angle (┬░): 30
    • Mounting Hole Diameter: 0.313
    • Mounting Hole Quantity: 2
    • O Rings Included: No
    • Outlet Port Diameter: 1.64
    • Package Contents: Thermostat Housing
    • Thermostat Included: No
  • 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
  • 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.
Brand: Dorman
Position: Upper
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Hummer H2 Upper V 8 Cyl 6.0L 364 5967
Dorman
2006 Hummer H2 Engine Coolant Thermostat Housing - Upper 8 Cyl 6.0L Dorman

P311-5E0BB5F    902-836  New

Qty:
In Stock & Ready to Ship
$21.24
Dorman Engine Coolant Thermostat Housing Upper
  • Engine Coolant Thermostat Housing
  • Does Not Include Thermostat Cover
  • Product Attributes:
    • Air Vent (Bleeder Valve): No
    • Bolts Included: No
    • Housing Neck Angle (┬░): 30
    • Mounting Hole Diameter: 0.313
    • Mounting Hole Quantity: 2
    • O Rings Included: No
    • Outlet Port Diameter: 1.64
    • Package Contents: Thermostat Housing
    • Thermostat Included: No
  • 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
  • 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.
Brand: Dorman
Position: Upper
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H2 Upper V 8 Cyl 6.0L 364 5967
Dorman
2008 Hummer H2 Engine Coolant Thermostat Housing - Water Pump 8 Cyl 6.2L Dorman

P311-43B3993    902-2081  New

12587395 , 8125873950 , 85945 , 89018168 , CH5945 , CO34829

Qty:
In Stock & Ready to Ship
$12.95
Dorman Engine Coolant Thermostat Housing Water Pump
  • Engine Coolant Thermostat Housing
  • Cover
  • Product Attributes:
    • Air Vent (Bleeder Valve): No
    • Bolt Hole Center To Bolt Hole Center: 3
    • Bolts Included: No
    • Flange Thickness: 0.32
    • Height: 3.5
    • Housing Neck Angle (┬░): 25 Deg
    • Housing Neck Angle (Γö¼Γûæ): 25 Deg
    • Mounting Hole Diameter: 0.27
    • Mounting Hole Quantity: 2
    • O Rings Included: No
    • Outlet Port Diameter: 1.2
    • Package Contents: 1 Thermostat Housing
    • Thermostat Included: No
  • 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
  • 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.
Brand: Dorman
Position: Water Pump
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2008 - Hummer H2 Water Pump V 8 Cyl 6.2L 376 6162
Proform
Engine Coolant Thermostat Housing Proform

P311-5E7B20C    141-501  New

Qty:
In Stock & Ready to Ship
$32.45
Proform Engine Coolant Thermostat Housing
  • Water Neck; Chrome; O-Ring Style; For SB and BB Chevy Engines; 15 Degree Type
  • Engine Water Neck; O-Ring Style; For SB and BB Chevy Engines; 15 Degree Type; Chrome Plated; Made From High-Quality Aluminum; Hardware Included; Officially Licensed GM Performance Parts Product; Sold Individually
  • Product Attributes:
    • Applications: Chevy Small Block 262 To 400 Engines 1958 To 1991; Chevy Big Block 366 To 454 Engines 1966 To 1990
    • Category: Chrome Water Neck
    • Emblem: No Emblems Or Logos
    • Feature/Benefit: Premium Chrome Water Neck.
  • Premium Chrome Water Neck. This Chevrolet water neck utilizes neoprene O-ring gaskets instead of regular gaskets eliminating leakage. Supplied with chrome bolts.

    • This is a Universal/Non Application Specific Product. To install this part, you made need to cut, weld, or make other modifications to your vehicle.
Brand: Proform
Additional Fitment Information:
Vehicle
Earl's Performance
Engine Coolant Thermostat Housing Earl's Performance

P311-55A157B    LS0005ERL  New

Qty:
In Stock & Ready to Ship
$180.32
Earl's Performance Engine Coolant Thermostat Housing
  • Water Pump Adapter Kit
  • Water Pump Adapter Kit; LS Water Pump To -20AN; Aluminum;
  • Product Attributes:
    • Adapter Type: Water Neck
    • WARNING CA Proposition 65: Yes
    • WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
  • Features:
    • Adapts Inlet And Outlet to -20 AN
    • Billet Aluminum And Stainless Steel Components
    • Anodized Protection On Aluminum Components
  • Earls leads the way with firsts for LS engines! Water pumps come with push-on barbs for clamping the standard radiator hose. Push-on hose connects just arent good enough for the hard core performance minded. Earls offers an adapter kit to convert inlet and outlet to -20 AN. One kits works with ALL LS water pumps. Included is an O-ring adapter plate which upgrades early LS water pumps to the later, less restrictive style of thermostat.

    • This is a Universal/Non Application Specific Product. To install this part, you made need to cut, weld, or make other modifications to your vehicle.
Brand: Earl's Performance
Additional Fitment Information:
Vehicle
Earl's Performance
Engine Coolant Thermostat Housing Earl's Performance

P311-0F32622    LS0025ERL  New

Qty:
In Stock & Ready to Ship
$174.95
Earl's Performance Engine Coolant Thermostat Housing
  • Water Pump Adapter Kit
  • Water Pump Adapter Kit; 12AN; For GM LS Engines; Aluminum; Pair;
  • Product Attributes:
    • WARNING CA Proposition 65: No
  • Features:
    • Billet Aluminum Block Adapters
    • Black Anodized Finish
    • Includes Gaskets And Mounting Hardware
  • These new billet block adapters allow the use of a big block Chevy electric water pump on the GM LS engine. These adapters feature (2) -12 AN O-ring female outlet ports for routing coolant back to the radiator. The 1/8 NPT port on the sides of the adapters allow a convenient hook-up for the steam tube outlet (eliminates modification of the radiator or water pump when installing the steam tube plumbing). This part includes the two block adapters, gaskets and mounting bolts.

    • This is a Universal/Non Application Specific Product. To install this part, you made need to cut, weld, or make other modifications to your vehicle.
Brand: Earl's Performance
Additional Fitment Information:
Vehicle
Earl's Performance
Engine Coolant Thermostat Housing Earl's Performance

P311-4CA1CFF    LS0022ERL  New

Qty:
In Stock & Ready to Ship
$169.67
Earl's Performance Engine Coolant Thermostat Housing
  • Water Pump Adapter Kit
  • Water Pump Adapter Kit; w/12AN O-Ring Ports;
  • Product Attributes:
    • WARNING CA Proposition 65: No
  • Features:
    • Water Pump Adapter Kit
  • These new adapters allow easy installation of a remote mounted electric water pump on the GM LS engine. These billet aluminum block adapters feature (4) -12 AN O-ring female ports for routing coolant to the radiator & remote mounted electric water pump. The 1/8 NPT Port can be used to connect to the steam tube plumbing. Ideal for use with Earls Adjustable Coolant Cross-Over Tube - part number LS0035ERL.

    • This is a Universal/Non Application Specific Product. To install this part, you made need to cut, weld, or make other modifications to your vehicle.
Brand: Earl's Performance
Additional Fitment Information:
Vehicle