Apex AWO2229 Engine Coolant Thermostat Gasket

Engine Coolant Thermostat Gasket for GM Applications

The Apex AWO2229 engine coolant thermostat gasket provides a direct sealing solution for a wide range of GM vehicles. It is used at the thermostat housing to help maintain a secure coolant seal and support stable engine temperature control.

• Engine coolant thermostat gasket for thermostat housing sealing
• Compatible with a broad range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Hummer, Saab, and Isuzu applications
• Fits 2004-2016 Chevrolet Express 2500, N/A
• Fits 2004-2016 GMC Savana 2500, N/A
• Fits 2004-2014 Cadillac Escalade, N/A, Thermostat O-Ring
• Part number AWO2229 for catalog lookup and ordering

Fitment Details

Compatible With 2004-2016 Chevrolet Express 2500, 2004-2016 Chevrolet Express 3500, 2004-2016 Chevrolet Silverado 2500 HD, 2007-2016 Chevrolet Silverado 3500 HD, 2014-2016 Chevrolet SS, 2016 Chevrolet Suburban 3500 HD, 2004-2016 GMC Savana 2500, 2004-2016 GMC Savana 3500, 2004-2016 GMC Sierra 2500 HD, and 2007-2016 GMC Sierra 3500 HD. Additional coverage includes 2004-2014 Cadillac Escalade and Escalade ESV, 2004-2013 Chevrolet Silverado 1500, 2004-2013 GMC Sierra 1500, 2006-2009 Chevrolet Impala, and 2004-2009 Hummer H2.

Part number AWO2229 also fits select Cadillac CTS, Chevrolet Camaro, Corvette, Trailblazer, Colorado, GMC Canyon, Pontiac G8, Pontiac Grand Prix, Saab 9-7x, and other listed applications across the 2004-2016 model years.

What It Helps Address

• Coolant seepage at the thermostat housing
• Loss of sealing after thermostat service
• Coolant odor or visible residue around the housing
• Temperature control issues caused by a compromised seal
• Repeat leaks after gasket replacement with the wrong application

Installation Notes

Verify the thermostat housing style and engine application before installation. Clean the mating surfaces thoroughly, remove old gasket material, and inspect the housing for warpage or corrosion. Confirm the replacement matches the vehicle-specific thermostat seal style, including O-ring or thermostat O-ring notes where listed. AWO2229 should be matched to the exact year, make, and model shown in the fitment data.

Quality Assurance

Apex AWO2229 is cataloged as an engine coolant thermostat gasket for the listed GM and related applications. Use the fitment data to confirm the correct seal for Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and other supported vehicles before service.