Gates CO34833 Engine Coolant Thermostat Housing Cover
OE Quality 60-Day Returns
Gates
 Coolant Outlet

Gates CO34833 Engine Coolant Thermostat Housing Cover

Brand Gates CO34833
0
No
Bolt Hole Quantity 4
By-Pass Holes No
Contents Coolant Outlet
Gasket Quantity 0
Material Aluminum
Number of Bolt Holes 4
Number of Gaskets 0
Number of Seals 0
OE Exact No
Outlet Inside Diameter 1.99
Outlet Inside Diameter 1 (in) 1.99
Outlet Outside Diameter 2.31
Outlet Outside Diameter 1 (in) 2.31
Type Coolant Outlet
Type Thermostat Cover
Product line Coolant Outlet
Fits Chevrolet and GMC · 32 vehicles

OE-style fit. Designed to perform like the original for straightforward replacement.

Aluminum construction. Helps resist common material issues found in aftermarket options.

Thermostat cover. A direct coolant outlet component for the cooling system.

Cross-references Dorman - OE Solutions 902-2127, Focus Auto Parts 86007 and Motorad CH6007 for the same application. See all 4.

$158.71Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $158.71
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Engine Coolant Thermostat Housing Cover options

Gates Coolant Outlet Cover for GM HD Trucks

The Gates Coolant Outlet CO34833 is an aluminum thermostat housing cover built for GM heavy-duty cooling system service. It is engineered to match original fit and function while addressing common aftermarket material and design issues.

Compatible with Chevrolet Silverado 2500 HD, Silverado 3500 HD, Silverado 2500 HD Classic, Silverado 3500 Classic, Silverado 3500, and GMC Sierra 2500 HD, Sierra 3500 HD, Sierra 2500 HD Classic, Sierra 3500 Classic, Sierra 3500 applications across the 2004-2010 model years.

  • Aluminum construction for durable cooling system service
  • Thermostat cover / coolant outlet design
  • Outlet inside diameter: 1.99 in.
  • Outlet outside diameter: 2.31 in.
  • 4 bolt holes for OE-style mounting
  • No gasket, seal, or bypass holes listed in the product data
  • Gates Coolant Outlet line focuses on direct-fit cooling system replacement parts

Product Details

Gates CO34833 is a coolant outlet and thermostat housing cover intended for GM truck cooling system repair where the original outlet has corroded, warped, or no longer seals correctly. The aluminum housing is designed to fit and perform like the original part, supporting long service life in demanding Silverado and Sierra HD applications. This part cross-references Dorman OE Solutions 902-2127 for the same application.

Common Repair Uses

  • Coolant leakage at the thermostat housing cover
  • Cracked or corroded coolant outlet housing
  • Improper sealing at the engine coolant outlet
  • Cooling system service on high-mileage Silverado and Sierra HD trucks
  • Replacement of a worn thermostat cover during cooling system repair

Installation Notes

Verify engine application, outlet diameter, and bolt-hole pattern before installation. Clean the mating surfaces thoroughly and inspect the thermostat, gasket surface, and related cooling components during service. Because gasket quantity is not listed with this part, confirm the required sealing components for your specific repair before assembly.

Quality Assurance

Gates positions this Coolant Outlet line as a direct-fit replacement program for common aftermarket cooling-system issues, with coverage that includes water outlets and complete thermostat housing assemblies. CO34833 is built to OE-style dimensions for GM truck applications and is intended to deliver consistent fit and service life.

Related reading

This part fits 32 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
2010ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2010ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2010GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2010GMCSierra 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2009ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2009ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2009GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2009GMCSierra 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2008ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2008ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2008GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2008GMCSierra 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007ChevroletSilverado 2500 HD Classic6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007ChevroletSilverado 3500 Classic6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007ChevroletSilverado 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007GMCSierra 2500 HD Classic6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007GMCSierra 3500 Classic6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2007GMCSierra 3500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2006ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2006ChevroletSilverado 35006.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2006GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2006GMCSierra 35006.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2005ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2005ChevroletSilverado 35006.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2005GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2005GMCSierra 35006.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2004ChevroletSilverado 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2004ChevroletSilverado 35006.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2004GMCSierra 2500 HD6.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
2004GMCSierra 35006.6LV8DIESELN/AEngine Coolant Thermostat Housing Cover - Fits multiple vehicle models.; Coolant Outlet
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dorman - OE Solutions — 902-2127Focus Auto Parts — 86007Motorad — CH600797361881