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Apex AWO2088 Engine Coolant Thermostat Gasket
Engine Coolant Thermostat Gasket for GM Applications
The Apex AWO2088 engine coolant thermostat gasket is a direct sealing component for thermostat service on a wide range of GM and related vehicles. It is used at the thermostat housing to help maintain a secure coolant seal during repair or replacement work.
- Engine coolant thermostat gasket / thermostat O-ring application
- Fits a broad range of Chevrolet, GMC, Cadillac, Buick, Hummer, Saab, Isuzu, and Pontiac vehicles
- Used in thermostat housing sealing service on GM V8 and V6 cooling systems
- Part number: AWO2088
- Brand: Apex
Fitment Coverage
- Fits 2004-2012 Chevrolet Colorado, Thermostat O-Ring
- Fits 2004-2012 GMC Canyon, Thermostat O-Ring
- Fits 2006-2010 Hummer H3, Thermostat O-Ring
- Fits 2009-2010 Hummer H3T, Thermostat O-Ring
- Fits 2002-2009 Chevrolet Trailblazer, Thermostat O-Ring
- Fits 2002-2009 GMC Envoy, Thermostat O-Ring
- Fits 2005-2009 Saab 9-7x, Thermostat O-Ring
- Fits 2003-2008 Isuzu Ascender, Thermostat O-Ring
- Fits 2007-2008 Isuzu i-290, Thermostat O-Ring
- Fits 2007-2008 Isuzu i-370, Thermostat O-Ring
- Fits 2004-2007 Buick Rainier, Thermostat O-Ring
- Fits 2002-2006 Chevrolet Trailblazer EXT, Thermostat O-Ring
- Fits 2002-2006 GMC Envoy XL, Thermostat O-Ring
- Fits 2006 Isuzu i-280, Thermostat O-Ring
- Fits 2006 Isuzu i-350, Thermostat O-Ring
- Fits 2004-2005 GMC Envoy XUV, Thermostat O-Ring
- Fits 2002-2004 Oldsmobile Bravada, Thermostat O-Ring
- Fits 2002-2003 Cadillac Escalade, Thermostat O-Ring
- Fits 2003 Cadillac Escalade ESV, Thermostat O-Ring
- Fits 2002-2003 Cadillac Escalade EXT, Thermostat O-Ring
- Fits 2002-2003 Chevrolet Avalanche 1500, Thermostat O-Ring
- Fits 1997-2003 Chevrolet Corvette, Thermostat O-Ring
- Fits 2003 Chevrolet Express 1500, Thermostat O-Ring
- Fits 2003 Chevrolet Express 2500, Thermostat O-Ring
- Fits 2003 Chevrolet Express 3500, Thermostat O-Ring
- Fits 1999-2003 Chevrolet Silverado 1500, Thermostat O-Ring
- Fits 2001-2003 Chevrolet Silverado 1500 HD, Thermostat O-Ring
- Fits 1999-2003 Chevrolet Silverado 2500, Thermostat O-Ring
- Fits 2001-2003 Chevrolet Silverado 2500 HD, Thermostat O-Ring
- Fits 2001-2003 Chevrolet Silverado 3500, Thermostat O-Ring
- Fits 2003 Chevrolet SSR, Thermostat O-Ring
- Fits 2000-2003 Chevrolet Suburban 1500, Thermostat O-Ring
- Fits 2000-2003 Chevrolet Suburban 2500, Thermostat O-Ring
- Fits 2000-2003 Chevrolet Tahoe, Thermostat O-Ring
- Fits 2003 GMC Savana 1500, Thermostat O-Ring
- Fits 2003 GMC Savana 2500, Thermostat seal
- Fits 2003 GMC Savana 3500
- Fits 1999-2003 GMC Sierra 1500, Thermostat O-Ring
- Fits 2001-2003 GMC Sierra 1500 HD, Thermostat O-Ring
- Fits 1999-2003 GMC Sierra 2500, Thermostat O-Ring
- Fits 2001-2003 GMC Sierra 2500 HD, Thermostat O-Ring
- Fits 2001-2003 GMC Sierra 3500, Thermostat O-Ring
- Fits 2000-2003 GMC Yukon, Thermostat O-Ring
- Fits 2000-2003 GMC Yukon XL 1500, Thermostat O-Ring
- Fits 2000-2003 GMC Yukon XL 2500, Thermostat O-Ring
- Fits 2003 Hummer H2, Thermostat O-Ring
- Fits 1998-2002 Chevrolet Camaro, Thermostat O-Ring
- Fits 1998-2002 Pontiac Firebird, Thermostat O-Ring
What This Gasket Helps Address
- Coolant seepage at the thermostat housing
- Damaged or flattened thermostat O-ring/seal during service
- Leak repair after thermostat replacement
- Cooling system maintenance on Chevrolet Silverado, Tahoe, and GMC Sierra applications
- Seal replacement for Corvette, Camaro, and Firebird thermostat service
Installation Notes
Verify the thermostat housing style and match the gasket to the original seal before installation. Clean the sealing surfaces thoroughly, inspect the housing for corrosion or pitting, and install the gasket evenly to avoid pinching or twisting. For fitment on Chevrolet Colorado, GMC Canyon, and related GM platforms, confirm the engine-specific thermostat seal configuration before assembly.
Quality Assurance
Apex part AWO2088 is cataloged as an engine coolant thermostat gasket for the listed applications. This part cross-references AC Delco and Dorman for the same application.
This part fits 171 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2012 | Chevrolet | Colorado | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2012 | GMC | Canyon | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2011 | Chevrolet | Colorado | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2011 | GMC | Canyon | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2010 | Chevrolet | Colorado | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2010 | GMC | Canyon | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2010 | Hummer | H3 | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2010 | Hummer | H3T | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2009 | Chevrolet | Colorado | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2009 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2009 | GMC | Canyon | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2009 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2009 | Hummer | H3 | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2009 | Hummer | H3T | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2009 | Saab | 9-7x | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2008 | Chevrolet | Colorado | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2008 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2008 | GMC | Canyon | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2008 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2008 | Hummer | H3 | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2008 | Isuzu | Ascender | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2008 | Isuzu | i-290 | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2008 | Isuzu | i-370 | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2008 | Saab | 9-7x | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2007 | Buick | Rainier | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2007 | Chevrolet | Colorado | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2007 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2007 | GMC | Canyon | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2007 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2007 | Hummer | H3 | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2007 | Isuzu | Ascender | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2007 | Isuzu | i-290 | 2.9L | L4 | N/A | Thermostat O-Ring |
| 2007 | Isuzu | i-370 | 3.7L | L5 | N/A | Thermostat O-Ring |
| 2007 | Saab | 9-7x | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | Buick | Rainier | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | Chevrolet | Colorado | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2006 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | GMC | Canyon | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2006 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | GMC | Envoy XL | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | Hummer | H3 | 3.5L | L5 | N/A | Thermostat O-Ring |
| 2006 | Isuzu | Ascender | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2006 | Isuzu | i-280 | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2006 | Isuzu | i-350 | 3.5L | L5 | N/A | Thermostat O-Ring |
| 2006 | Saab | 9-7x | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | Buick | Rainier | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | Chevrolet | Colorado | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2005 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | GMC | Canyon | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2005 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | GMC | Envoy XL | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | GMC | Envoy XUV | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | Isuzu | Ascender | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2005 | Saab | 9-7x | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | Buick | Rainier | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | Chevrolet | Colorado | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2004 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | GMC | Canyon | 2.8L | L4 | N/A | Thermostat O-Ring |
| 2004 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | GMC | Envoy XL | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | GMC | Envoy XUV | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | Isuzu | Ascender | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2004 | Oldsmobile | Bravada | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2003 | Cadillac | Escalade | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | Cadillac | Escalade ESV | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Express 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Express 2500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Express 3500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | SSR | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2003 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2003 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2003 | GMC | Envoy XL | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2003 | GMC | Savana 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Savana 2500 | 4.8L | V8 | N/A | Thermostat seal |
| 2003 | GMC | Savana 3500 | 4.8L | V8 | N/A | |
| 2003 | GMC | Sierra 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Sierra 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Sierra 3500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Yukon | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2003 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Hummer | H2 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2003 | Isuzu | Ascender | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2003 | Oldsmobile | Bravada | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2002 | Cadillac | Escalade | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2002 | Cadillac | Escalade EXT | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Camaro | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2002 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2002 | GMC | Envoy | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2002 | GMC | Envoy XL | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2002 | GMC | Sierra 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Sierra 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Sierra 3500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Yukon | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2002 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2002 | Oldsmobile | Bravada | 4.2L | L6 | N/A | Thermostat O-Ring |
| 2002 | Pontiac | Firebird | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Camaro | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Silverado 1500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Silverado 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Silverado 2500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Silverado 3500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Sierra 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Sierra 1500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Sierra 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Sierra 2500 HD | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Sierra 3500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Yukon | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2001 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2001 | Pontiac | Firebird | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Camaro | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Silverado 2500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Suburban 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2000 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2000 | GMC | Sierra 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2000 | GMC | Sierra 2500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2000 | GMC | Yukon | 4.8L | V8 | N/A | Thermostat O-Ring |
| 2000 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 2000 | GMC | Yukon XL 2500 | 6.0L | V8 | N/A | Thermostat O-Ring |
| 2000 | Pontiac | Firebird | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1999 | Chevrolet | Camaro | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1999 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1999 | Chevrolet | Silverado 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 1999 | Chevrolet | Silverado 2500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 1999 | GMC | Sierra 1500 | 4.8L | V8 | N/A | Thermostat O-Ring |
| 1999 | GMC | Sierra 2500 | 5.3L | V8 | N/A | Thermostat O-Ring |
| 1999 | Pontiac | Firebird | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1998 | Chevrolet | Camaro | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1998 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1998 | Pontiac | Firebird | 5.7L | V8 | N/A | Thermostat O-Ring |
| 1997 | Chevrolet | Corvette | 5.7L | V8 | N/A | Thermostat O-Ring |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.