An engine's thermostat regulates the temperature of the engine by controlling coolant flow, its job is to block the flow of coolant to the radiator until the engine has warmed up.

Compatible with Buick Vehicles:
2008-2009 Allure
2008-2009 Lacrosse
2004-2006 Rainier

Compatible with Cadillac Vehicles:
2004-2007 CTS
2003-2006 Escalade
2004-2006 Escalade ESV
2004-2006 Escalade EXT

Compatible with Chevy Vehicles:
2003-2006 Avalanche 1500
2004-2008 Corvette
2004-2006 Express 1500, 2500, 3500
2006-2009 Impala
2006-2007 Monte Carlo
2003-2006 Silverado 1500
2005-2006 Silverado 1500 HD
2004 Silverado 2500
2004-2006 Silverado 2500 HD
2004-2006 Silverado 3500
2003-2006 SSR
2003-2006 Suburban 1500
2004-2006 Suburban 2500
2003-2006 Tahoe
2006 Trailblazer
2003-2006 Trailblazer EXT

Compatible with GMC Vehicles:
2005-2006 Envoy
2003-2006 Envoy XL
2004-2005 Envoy XUV
2004-2006 Savana 1500, 2500, 3500
2003-2006 Sierra 1500
2005-2006 Sierra 1500 HD
2004 Sierra 2500
2004-2006 Sierra 2500 HD
2004-2006 Sierra 3500
2003-2006 Yukon
2003-2006 Yukon XL 1500
2004-2006 Yukon XL 2500

Compatible with Hummer Vehicles:
2004-2006 H2

Compatible with Isuzu Vehicles:
2003-2006 Ascender

Compatible with Pontiac Vehicles:
2008-2009 G8
2005-2008 Grand Prix
2004-2006 GTO

Compatible with Saab Vehicles:
2005-2006 9-7x

Replaces Part #: 131-156, 131156, 12600171 thermostat with gasket.

NOTE: This is NOT a genuine part, it's a aftermarket replacement part manufactured by Allmotorparts.

NOTE: To ensure accurate fitment, please confirm your vehicle information in the above compatibility section and the description.