HomeBelts and Cooling > Gaskets and Sealing SystemsApex AWO2088 Engine Coolant Thermostat Gasket
Part #: AWO2088

Apex AWO2088 Engine Coolant Thermostat Gasket

⚙️ 171 vehicles fit this part
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🚗Fitment: Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, and Saab, 9-7x, Ascender, Avalanche 1500, Bravada, Camaro, Canyon, Colorado, Corvette, Envoy, Envoy XL, Envoy XUV, Escalade, Escalade ESV, Escalade EXT, Express 1500, Express 2500, Express 3500, Firebird, H2, H3, H3T, i-280, i-290, i-350, i-370, Rainier, Savana 1500, Savana 2500, Savana 3500, Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Silverado 1500, Silverado 1500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, SSR, Suburban 1500, Suburban 2500, Tahoe, Trailblazer, Trailblazer EXT, Yukon, Yukon XL 1500, and Yukon XL 2500
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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:

YearMakeModelLitersCylindersPositionNotes
2012ChevroletColorado2.9LL4N/AThermostat O-Ring
2012GMCCanyon2.9LL4N/AThermostat O-Ring
2011ChevroletColorado2.9LL4N/AThermostat O-Ring
2011GMCCanyon2.9LL4N/AThermostat O-Ring
2010ChevroletColorado2.9LL4N/AThermostat O-Ring
2010GMCCanyon2.9LL4N/AThermostat O-Ring
2010HummerH33.7LL5N/AThermostat O-Ring
2010HummerH3T3.7LL5N/AThermostat O-Ring
2009ChevroletColorado2.9LL4N/AThermostat O-Ring
2009ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2009GMCCanyon2.9LL4N/AThermostat O-Ring
2009GMCEnvoy4.2LL6N/AThermostat O-Ring
2009HummerH33.7LL5N/AThermostat O-Ring
2009HummerH3T3.7LL5N/AThermostat O-Ring
2009Saab9-7x4.2LL6N/AThermostat O-Ring
2008ChevroletColorado2.9LL4N/AThermostat O-Ring
2008ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2008GMCCanyon2.9LL4N/AThermostat O-Ring
2008GMCEnvoy4.2LL6N/AThermostat O-Ring
2008HummerH33.7LL5N/AThermostat O-Ring
2008IsuzuAscender4.2LL6N/AThermostat O-Ring
2008Isuzui-2902.9LL4N/AThermostat O-Ring
2008Isuzui-3703.7LL5N/AThermostat O-Ring
2008Saab9-7x4.2LL6N/AThermostat O-Ring
2007BuickRainier4.2LL6N/AThermostat O-Ring
2007ChevroletColorado2.9LL4N/AThermostat O-Ring
2007ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2007GMCCanyon2.9LL4N/AThermostat O-Ring
2007GMCEnvoy4.2LL6N/AThermostat O-Ring
2007HummerH33.7LL5N/AThermostat O-Ring
2007IsuzuAscender4.2LL6N/AThermostat O-Ring
2007Isuzui-2902.9LL4N/AThermostat O-Ring
2007Isuzui-3703.7LL5N/AThermostat O-Ring
2007Saab9-7x4.2LL6N/AThermostat O-Ring
2006BuickRainier4.2LL6N/AThermostat O-Ring
2006ChevroletColorado2.8LL4N/AThermostat O-Ring
2006ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2006ChevroletTrailblazer EXT4.2LL6N/AThermostat O-Ring
2006GMCCanyon2.8LL4N/AThermostat O-Ring
2006GMCEnvoy4.2LL6N/AThermostat O-Ring
2006GMCEnvoy XL4.2LL6N/AThermostat O-Ring
2006HummerH33.5LL5N/AThermostat O-Ring
2006IsuzuAscender4.2LL6N/AThermostat O-Ring
2006Isuzui-2802.8LL4N/AThermostat O-Ring
2006Isuzui-3503.5LL5N/AThermostat O-Ring
2006Saab9-7x4.2LL6N/AThermostat O-Ring
2005BuickRainier4.2LL6N/AThermostat O-Ring
2005ChevroletColorado2.8LL4N/AThermostat O-Ring
2005ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2005ChevroletTrailblazer EXT4.2LL6N/AThermostat O-Ring
2005GMCCanyon2.8LL4N/AThermostat O-Ring
2005GMCEnvoy4.2LL6N/AThermostat O-Ring
2005GMCEnvoy XL4.2LL6N/AThermostat O-Ring
2005GMCEnvoy XUV4.2LL6N/AThermostat O-Ring
2005IsuzuAscender4.2LL6N/AThermostat O-Ring
2005Saab9-7x4.2LL6N/AThermostat O-Ring
2004BuickRainier4.2LL6N/AThermostat O-Ring
2004ChevroletColorado2.8LL4N/AThermostat O-Ring
2004ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2004ChevroletTrailblazer EXT4.2LL6N/AThermostat O-Ring
2004GMCCanyon2.8LL4N/AThermostat O-Ring
2004GMCEnvoy4.2LL6N/AThermostat O-Ring
2004GMCEnvoy XL4.2LL6N/AThermostat O-Ring
2004GMCEnvoy XUV4.2LL6N/AThermostat O-Ring
2004IsuzuAscender4.2LL6N/AThermostat O-Ring
2004OldsmobileBravada4.2LL6N/AThermostat O-Ring
2003CadillacEscalade5.3LV8N/AThermostat O-Ring
2003CadillacEscalade ESV6.0LV8N/AThermostat O-Ring
2003CadillacEscalade EXT6.0LV8N/AThermostat O-Ring
2003ChevroletAvalanche 15005.3LV8N/AThermostat O-Ring
2003ChevroletCorvette5.7LV8N/AThermostat O-Ring
2003ChevroletExpress 15005.3LV8N/AThermostat O-Ring
2003ChevroletExpress 25004.8LV8N/AThermostat O-Ring
2003ChevroletExpress 35004.8LV8N/AThermostat O-Ring
2003ChevroletSilverado 15004.8LV8N/AThermostat O-Ring
2003ChevroletSilverado 1500 HD6.0LV8N/AThermostat O-Ring
2003ChevroletSilverado 25006.0LV8N/AThermostat O-Ring
2003ChevroletSilverado 2500 HD6.0LV8N/AThermostat O-Ring
2003ChevroletSilverado 35006.0LV8N/AThermostat O-Ring
2003ChevroletSSR5.3LV8N/AThermostat O-Ring
2003ChevroletSuburban 15005.3LV8N/AThermostat O-Ring
2003ChevroletSuburban 25006.0LV8N/AThermostat O-Ring
2003ChevroletTahoe4.8LV8N/AThermostat O-Ring
2003ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2003ChevroletTrailblazer EXT4.2LL6N/AThermostat O-Ring
2003GMCEnvoy4.2LL6N/AThermostat O-Ring
2003GMCEnvoy XL4.2LL6N/AThermostat O-Ring
2003GMCSavana 15005.3LV8N/AThermostat O-Ring
2003GMCSavana 25004.8LV8N/AThermostat seal
2003GMCSavana 35004.8LV8N/A
2003GMCSierra 15004.8LV8N/AThermostat O-Ring
2003GMCSierra 1500 HD6.0LV8N/AThermostat O-Ring
2003GMCSierra 25006.0LV8N/AThermostat O-Ring
2003GMCSierra 2500 HD6.0LV8N/AThermostat O-Ring
2003GMCSierra 35006.0LV8N/AThermostat O-Ring
2003GMCYukon4.8LV8N/AThermostat O-Ring
2003GMCYukon XL 15005.3LV8N/AThermostat O-Ring
2003GMCYukon XL 25006.0LV8N/AThermostat O-Ring
2003HummerH26.0LV8N/AThermostat O-Ring
2003IsuzuAscender4.2LL6N/AThermostat O-Ring
2003OldsmobileBravada4.2LL6N/AThermostat O-Ring
2002CadillacEscalade5.3LV8N/AThermostat O-Ring
2002CadillacEscalade EXT6.0LV8N/AThermostat O-Ring
2002ChevroletAvalanche 15005.3LV8N/AThermostat O-Ring
2002ChevroletCamaro5.7LV8N/AThermostat O-Ring
2002ChevroletCorvette5.7LV8N/AThermostat O-Ring
2002ChevroletSilverado 15004.8LV8N/AThermostat O-Ring
2002ChevroletSilverado 1500 HD6.0LV8N/AThermostat O-Ring
2002ChevroletSilverado 25006.0LV8N/AThermostat O-Ring
2002ChevroletSilverado 2500 HD6.0LV8N/AThermostat O-Ring
2002ChevroletSilverado 35006.0LV8N/AThermostat O-Ring
2002ChevroletSuburban 15005.3LV8N/AThermostat O-Ring
2002ChevroletSuburban 25006.0LV8N/AThermostat O-Ring
2002ChevroletTahoe4.8LV8N/AThermostat O-Ring
2002ChevroletTrailblazer4.2LL6N/AThermostat O-Ring
2002ChevroletTrailblazer EXT4.2LL6N/AThermostat O-Ring
2002GMCEnvoy4.2LL6N/AThermostat O-Ring
2002GMCEnvoy XL4.2LL6N/AThermostat O-Ring
2002GMCSierra 15004.8LV8N/AThermostat O-Ring
2002GMCSierra 1500 HD6.0LV8N/AThermostat O-Ring
2002GMCSierra 25006.0LV8N/AThermostat O-Ring
2002GMCSierra 2500 HD6.0LV8N/AThermostat O-Ring
2002GMCSierra 35006.0LV8N/AThermostat O-Ring
2002GMCYukon4.8LV8N/AThermostat O-Ring
2002GMCYukon XL 15005.3LV8N/AThermostat O-Ring
2002GMCYukon XL 25006.0LV8N/AThermostat O-Ring
2002OldsmobileBravada4.2LL6N/AThermostat O-Ring
2002PontiacFirebird5.7LV8N/AThermostat O-Ring
2001ChevroletCamaro5.7LV8N/AThermostat O-Ring
2001ChevroletCorvette5.7LV8N/AThermostat O-Ring
2001ChevroletSilverado 15004.8LV8N/AThermostat O-Ring
2001ChevroletSilverado 1500 HD6.0LV8N/AThermostat O-Ring
2001ChevroletSilverado 25006.0LV8N/AThermostat O-Ring
2001ChevroletSilverado 2500 HD6.0LV8N/AThermostat O-Ring
2001ChevroletSilverado 35006.0LV8N/AThermostat O-Ring
2001ChevroletSuburban 15005.3LV8N/AThermostat O-Ring
2001ChevroletSuburban 25006.0LV8N/AThermostat O-Ring
2001ChevroletTahoe4.8LV8N/AThermostat O-Ring
2001GMCSierra 15004.8LV8N/AThermostat O-Ring
2001GMCSierra 1500 HD6.0LV8N/AThermostat O-Ring
2001GMCSierra 25006.0LV8N/AThermostat O-Ring
2001GMCSierra 2500 HD6.0LV8N/AThermostat O-Ring
2001GMCSierra 35006.0LV8N/AThermostat O-Ring
2001GMCYukon4.8LV8N/AThermostat O-Ring
2001GMCYukon XL 15005.3LV8N/AThermostat O-Ring
2001GMCYukon XL 25006.0LV8N/AThermostat O-Ring
2001PontiacFirebird5.7LV8N/AThermostat O-Ring
2000ChevroletCamaro5.7LV8N/AThermostat O-Ring
2000ChevroletCorvette5.7LV8N/AThermostat O-Ring
2000ChevroletSilverado 15004.8LV8N/AThermostat O-Ring
2000ChevroletSilverado 25005.3LV8N/AThermostat O-Ring
2000ChevroletSuburban 15005.3LV8N/AThermostat O-Ring
2000ChevroletSuburban 25006.0LV8N/AThermostat O-Ring
2000ChevroletTahoe4.8LV8N/AThermostat O-Ring
2000GMCSierra 15004.8LV8N/AThermostat O-Ring
2000GMCSierra 25005.3LV8N/AThermostat O-Ring
2000GMCYukon4.8LV8N/AThermostat O-Ring
2000GMCYukon XL 15005.3LV8N/AThermostat O-Ring
2000GMCYukon XL 25006.0LV8N/AThermostat O-Ring
2000PontiacFirebird5.7LV8N/AThermostat O-Ring
1999ChevroletCamaro5.7LV8N/AThermostat O-Ring
1999ChevroletCorvette5.7LV8N/AThermostat O-Ring
1999ChevroletSilverado 15004.8LV8N/AThermostat O-Ring
1999ChevroletSilverado 25005.3LV8N/AThermostat O-Ring
1999GMCSierra 15004.8LV8N/AThermostat O-Ring
1999GMCSierra 25005.3LV8N/AThermostat O-Ring
1999PontiacFirebird5.7LV8N/AThermostat O-Ring
1998ChevroletCamaro5.7LV8N/AThermostat O-Ring
1998ChevroletCorvette5.7LV8N/AThermostat O-Ring
1998PontiacFirebird5.7LV8N/AThermostat O-Ring
1997ChevroletCorvette5.7LV8N/AThermostat O-Ring

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