Gates 34702 Engine Coolant Thermostat

Integrated Housing Thermostat for GM Applications

Gates Part Number 34702 is an integrated housing thermostat built for accurate coolant temperature control in a wide range of GM vehicles. This engine coolant thermostat helps maintain the 187-degree opening temperature specified for many applications, supporting stable operating temperatures in Chevrolet, GMC, Cadillac, Pontiac, Buick, Hummer, Saab, and Isuzu models.

The Gates Integrated Housing Thermostat line focuses on OE-style replacement solutions for vehicles that use a thermostat and housing assembly together. Gates applies its aftermarket cooling-system development to deliver a direct replacement option for applications that require integrated housing design, seal support, and OE performance characteristics.

Key Features

• Integrated housing thermostat design for select GM cooling systems
• Start-to-open temperature: 187°F / 86°C
• OE Performance rating for factory-style temperature regulation
• Jiggle pin weep hole included for air bleeding during service
• 2 bolt holes for the specified housing configuration
• 1 seal and 1 jiggle pin/check valve noted in the design
• Outlet inside diameter: 1.22 in; outlet outside diameter: 1.63 in
• Non-electric thermostat construction

Detailed Description

Gates 34702 is an integrated housing thermostat engineered for vehicles that use a combined thermostat and housing assembly. By regulating coolant flow at the specified opening temperature, it helps the engine reach and maintain normal operating temperature more consistently. That matters for drivability, heater performance, and cooling-system balance in applications such as the Chevrolet Silverado, Tahoe, Corvette, and GMC Sierra.

This part cross-references Dorman OE Solutions 902-2836 for the same application. It also aligns with other listed interchange references, including Motorad 524KT, for select fitments. For buyers searching by vehicle, this thermostat is listed for many 1997-2009 GM platforms, including Chevrolet Corvette, Chevrolet Impala, GMC Envoy, Pontiac Grand Prix, Cadillac CTS, and Buick LaCrosse.

What It Helps Address

• Coolant temperature that runs too cool or too warm
• Temperature fluctuation caused by a worn thermostat assembly
• Leaks at the thermostat housing interface
• Air trapped in the cooling system after service
• Loss of OE-style temperature control in integrated housing applications

Installation Notes and Tips

Verify the thermostat housing style, outlet dimensions, and bolt-hole count before installation. This part is listed for specific applications such as Fits 2004-2006 Chevrolet Silverado 1500, N/A; Fits 2004-2006 GMC Sierra 1500, N/A; and Fits 2006-2009 Chevrolet Impala, N/A. Additional fitments include Fits 2004-2006 Chevrolet Tahoe, N/A and Fits 2004-2006 Cadillac Escalade, N/A.

Confirm the cooling system is fully drained and the mating surfaces are clean before assembly. The jiggle pin weep hole helps with air evacuation, so orient the part according to the vehicle service procedure. Always match the thermostat to the vehicle’s specified temperature and housing configuration.

Quality Assurance

Gates develops integrated thermostat housings as aftermarket alternatives to OE dealership parts, with a focus on accurate temperature regulation and OE-performance replacement standards. Part Number 34702 is built for the applications listed above and is backed by Gates’ cooling-system product development expertise.