HomeBelts and Cooling > Thermostat and HousingGates CO35041 Engine Coolant Thermostat Housing Cover
Part #: CO35041

Gates CO35041 Engine Coolant Thermostat Housing Cover

Coolant Outlet
⚙️ 12 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Coolant Outlet
🚗Fitment: Chevrolet and GMC, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Gates Coolant Outlet Thermostat Housing Cover

The Gates Coolant Outlet Engine Coolant Thermostat Housing Cover (Part Number CO35041) is designed for reliable cooling system performance in heavy-duty Chevrolet and GMC trucks. This thermostat cover is engineered to meet the demands of Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD models.

  • Constructed from durable aluminum for corrosion resistance and heat dissipation
  • Outlet outside diameter of 2 inches and inside diameter of 1.65 inches for precise coolant flow
  • Features 3 bolt holes for secure mounting
  • Thermostat cover type designed to protect and house the engine thermostat
  • Compatible with Chevrolet and GMC heavy-duty truck models

Product Line: Gates Coolant Outlet

The Gates Coolant Outlet product line focuses on components that manage engine coolant flow and temperature regulation. This line includes thermostat covers engineered to provide a reliable seal and maintain optimal engine temperature. The CO35041 thermostat housing cover is part of this line, offering a robust aluminum construction tailored for heavy-duty truck applications.

Detailed Product Description

This engine coolant thermostat housing cover is made from aluminum, providing strength and resistance to corrosion under high-temperature conditions. The outlet dimensions—2 inches outside diameter and 1.65 inches inside diameter—ensure proper coolant circulation through the cooling system. With three bolt holes, the cover mounts securely to the engine, maintaining a tight seal without the need for additional gaskets. Although this part is not an exact OE replacement, it is designed to meet the functional requirements of the specified Chevrolet and GMC truck models.

Compatible Vehicles and Common Applications

  • Chevrolet Sierra 2500 HD and 3500 HD
  • GMC Sierra 2500 HD and 3500 HD
  • Chevrolet Silverado 2500 HD and 3500 HD
  • Replacement for worn or damaged thermostat housing covers
  • Helps prevent coolant leaks and overheating issues

Installation Notes and Tips

When installing the Gates CO35041 thermostat housing cover, ensure the mating surfaces are clean and free of old gasket material or debris. Although this part does not include a gasket, verify if a new gasket is required for your specific vehicle application. Tighten the three mounting bolts evenly to the manufacturer's torque specifications to avoid warping or leaks.

Quality Assurance and Warranty

Gates manufactures this thermostat housing cover with quality materials and precise engineering to support reliable engine cooling system operation. While this part is not an exact OE replacement, it is built to meet or exceed industry standards for durability and fitment. Warranty details should be confirmed with the distributor or manufacturer.

BrandGates
Part NumberCO35041
PositionCoolant Outlet
MaterialAluminum
Outlet Outside Diameter2
Bolt Hole Quantity3
TypeThermostat cover
Gasket Quantity0
Outlet Inside Diameter1.65
98410
9848No
ContentsThermostat cover
OE ExactNo

This part fits 12 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2019ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2019ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2019GMCSierra 2500 HD6.6LV8DIESELN/ACoolant Outlet
2019GMCSierra 3500 HD6.6LV8DIESELN/ACoolant Outlet
2018ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2018ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2018GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2018GMCSierra 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2017ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2017ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2017GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2017GMCSierra 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

126771631268459115-11124

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.