Gates 33329 Engine Coolant Thermostat

OE Type Thermostat for GM Cooling Systems

Gates 33329 is an OE Type Engine Coolant Thermostat built for precise temperature control and a leak-free, OEM-equivalent fit. It is a 195-degree thermostat for a wide range of Chevrolet, GMC, Buick, Pontiac, Oldsmobile, Saturn, and Cadillac applications, including Chevrolet Equinox, Pontiac Torrent, and Buick Rendezvous.

Key Features

• OE Type Thermostat construction for factory-style temperature regulation
• 195-degree start-to-open temperature for listed applications
• Bottom by-pass design for the correct cooling-system layout
• Steel, brass, and copper materials for durable thermal response
• OE Performance comparison rating for replacement use
• Seal included per fitment notes
• Gates part number 33329 for easy catalog lookup

Product Details

The Gates OE Type Thermostat line focuses on accurate coolant flow control and proper sealing in applications that require an OEM-style replacement. Part number 33329 is engineered to match the original thermostat function in vehicles such as the Chevrolet Malibu, Pontiac Grand Prix, GMC Sierra 2500 HD, and Buick Century. This thermostat opens at 195 degrees, helping the engine reach and maintain the intended operating temperature for the listed fitments. This part cross-references Monroe Shocks & Struts (e.g., 32299) for the same application.

Common Problems It Can Address

• Engine running too cool or too hot due to thermostat wear
• Temperature fluctuation during warm-up or steady driving
• Coolant flow issues caused by a sticking thermostat
• Leak concerns at the thermostat sealing surface
• Incorrect replacement fit in OE-style cooling system service

Installation Notes

Verify the engine’s thermostat specification before installation and confirm the housing and bypass design match the original part. Clean the sealing surfaces thoroughly, inspect the coolant condition, and follow the vehicle service procedure for refill and air bleeding after installation. Gates 33329 is listed for N/A position applications and is referenced across multiple GM platforms, including Chevrolet Silverado 2500 HD, Pontiac Aztek, and GMC Yukon XL 2500.

Quality Assurance

Gates OE Type Thermostats are built to provide precise temperature control and OEM-equivalent fit for the listed applications. Part number 33329 is specified as an OE Type Thermostat with OE Performance comparison rating for direct replacement service.