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Gates 33939 Engine Coolant Thermostat
| Brand | Gates 33939 |
|---|---|
| 1 | |
| Bolt Hole Quantity | 2 |
| Check Valve | No |
| Electric | No |
| Electric | No |
| Jiggle Pin Weep Hole | No |
| Jiggle Pin/Check Valve | No |
| Number of Bolt Holes | 2 |
| Number of Jiggle Pins/Check Valves | 0 |
| Number of Seals | 1 |
| OE Comparison Rating | OE Performance |
| OE Exact | No |
| Outlet Inside Diameter | 1.067 |
| Outlet Inside Diameter 1 (in) | 1.067 |
| Outlet Outside Diameter | 1.3 |
| Outlet Outside Diameter 1 (in) | 1.3 |
| Start to Open Temperature | 88 |
| Start to Open Temperature | 190 |
| Temperature (C) | 88 |
| Type | Integrated Housing Thermostat |
| Product line | Integrated Housing Thermostat |
| Fits | Chevrolet, GMC, Saab, Isuzu, Buick, and Oldsmobile · 46 vehicles |
Integrated housing design. Combines the thermostat and housing for a cleaner, simpler replacement.
OE performance rating. Matches original-equipment standards for dependable temperature control.
Starts at 190°F. Helps regulate coolant flow at the right operating temperature.
Cross-references BBB Industries 14659, Dorman - OE Solutions 902-2131 and Dorman - OE Solutions 902-2800 for the same application. See all 13.
Integrated Housing Thermostat for OE Temperature Control
Gates 33939 is an integrated housing thermostat built for precise engine coolant temperature regulation. It is an OE Performance replacement for vehicles that use a thermostat and housing assembly in one unit, helping maintain stable operating temperature in the cooling system.
This Gates Integrated Housing Thermostat line focuses on aftermarket coverage for applications that use integrated thermostat housings, giving technicians a direct replacement option for OE-style cooling system service.
Key Features
- Integrated Housing Thermostat design
- Start to open temperature: 190°F / 88°C
- OE Performance rating
- 2 bolt holes
- 1 seal
- No electric connector
- No jiggle pin weep hole and no check valve
- Outlet inside diameter: 1.067 in
- Outlet outside diameter: 1.3 in
Product Details
The Gates 33939 thermostat is engineered for cooling systems that require an integrated housing style. By regulating coolant flow at the specified opening temperature, it helps the engine reach and maintain normal operating temperature more consistently. This part is listed for 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy, 2005-2009 Saab 9-7x, 2003-2008 Isuzu Ascender, 2004-2007 Buick Rainier, 2002-2006 Chevrolet Trailblazer EXT, 2002-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, and 2002-2004 Oldsmobile Bravada applications. Gates 33939 also cross-references Dorman OE Solutions 902-2131 for the same application.
Common Cooling System Issues It May Address
- Engine running too cool or taking too long to warm up
- Temperature fluctuations during normal driving
- Cooling system service on an integrated thermostat housing
- Replacement needs on OE-style thermostat and housing assemblies
- Fitment-specific cooling maintenance for Chevrolet Trailblazer and GMC Envoy platforms
Installation Notes and Tips
Verify the housing style, outlet dimensions, bolt-hole count, and opening temperature before installation. This part uses a 2-bolt integrated housing design and is listed with a seal. Confirm the vehicle’s cooling system specification against the application notes for the exact model year and engine setup before service.
Quality Assurance
Gates develops integrated thermostat housing solutions to meet OE-style temperature control requirements for modern cooling systems. The 33939 is positioned as an OE Performance replacement for applications that need accurate coolant regulation in an integrated housing format.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2009 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2009 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2009 | Saab | 9-7x | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2008 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2008 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2008 | Isuzu | Ascender | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2008 | Saab | 9-7x | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2007 | Buick | Rainier | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2007 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2007 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2007 | Isuzu | Ascender | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2007 | Saab | 9-7x | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | Buick | Rainier | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | Chevrolet | Trailblazer EXT | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | GMC | Envoy XL | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | Isuzu | Ascender | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2006 | Saab | 9-7x | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | Buick | Rainier | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | Chevrolet | Trailblazer EXT | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | GMC | Envoy XL | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | GMC | Envoy XUV | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | Isuzu | Ascender | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2005 | Saab | 9-7x | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | Buick | Rainier | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | Chevrolet | Trailblazer EXT | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | GMC | Envoy XL | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | GMC | Envoy XUV | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | Isuzu | Ascender | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2004 | Oldsmobile | Bravada | 4.2L | L6 | GAS | N/A | 190 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2003 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2003 | Chevrolet | Trailblazer EXT | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2003 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2003 | GMC | Envoy XL | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2003 | Isuzu | Ascender | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2003 | Oldsmobile | Bravada | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2002 | Chevrolet | Trailblazer | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2002 | Chevrolet | Trailblazer EXT | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2002 | GMC | Envoy | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2002 | GMC | Envoy XL | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
| 2002 | Oldsmobile | Bravada | 4.2L | L6 | GAS | N/A | 192 Degree; OE Temperature; Seal included; Integrated Housing Thermostat |
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