Gates 33910 Engine Coolant Thermostat

Integrated thermostat housing for OE-style cooling control

Gates 33910 is an integrated housing thermostat built for accurate engine temperature regulation in applications that use a combined thermostat and housing design. It supports stable coolant flow control for vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade with the correct OE-style cooling setup.

The Gates Integrated Housing Thermostat line focuses on replacement solutions for modern cooling systems that combine the thermostat and housing into one assembly. Part number 33910 follows that approach with OE Performance positioning for direct-fit service on supported GM trucks, SUVs, and performance cars.

Key features

• Integrated housing thermostat design for simplified cooling system service
• Start-to-open temperature: 187°F / 86°C
• OE Performance replacement standard
• 3 bolt holes for mounting
• Check valve design with one jiggle pin/check valve
• One seal included in the assembly design
• Outlet inside diameter: 1.31 in; outlet outside diameter: 1.65 in
• Non-electric thermostat construction

Detailed product overview

Gates 33910 is an engine coolant thermostat with an integrated housing, made for vehicles that use a combined thermostat housing instead of a separate thermostat body. Gates develops this product line to address the growing number of vehicles using integrated cooling components, giving technicians an OE-style replacement option for temperature control service. This part cross-references Stant 14298 and Motorad 379-187 for the same application.

Compatible With 1997-2003 Chevrolet Corvette, 1998-2002 Chevrolet Camaro, 1998-2002 Pontiac Firebird, 1999-2003 Chevrolet Silverado 1500, and 2000-2003 GMC Yukon applications that call for this integrated thermostat housing design. It also fits many GM full-size trucks and SUVs, including the Chevrolet Tahoe, Suburban, Avalanche 1500, and GMC Sierra and Yukon XL models listed in the fitment data.

Common issues this part addresses

• Engine running too cool or too warm due to thermostat control problems
• Coolant temperature fluctuation during normal driving
• Leaking or worn integrated thermostat housing service points
• Cooling system maintenance on vehicles with OE-style combined housings
• Replacement needs on GM trucks, SUVs, and performance cars with the listed fitment

Installation notes and tips

Verify the original housing style, outlet dimensions, and bolt pattern before installation. This part uses a 3-bolt integrated housing layout and is specified for applications with a 186°F OE temperature requirement in the fitment notes. Confirm vehicle-specific cooling system requirements for the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade before ordering.

Fitment includes 2007 Hummer H2, 2006 Cadillac Escalade, 2003 Chevrolet Corvette, 2003 GMC Savana 3500, and 2003 Isuzu Ascender, along with the other listed GM applications. Use the vehicle notes to match original equipment or most aftermarket water pump configurations where specified.

Quality assurance

Gates supports this thermostat housing with OE Performance positioning and product development focused on aftermarket alternatives to OE dealership parts. The integrated housing design reflects Gates research and development work for modern cooling systems that require accurate temperature regulation.