Dorman 902-2060 Engine Coolant Thermostat Housing - Upper

Engine Coolant Thermostat Housing for GM Trucks

Dorman 902-2060 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made from metal and engineered to handle extreme temperature swings in the cooling system, helping maintain a secure thermostat housing seal on GM truck and van applications.

Compatible With 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500, 2001-2006 Chevrolet Suburban 2500, 2002-2006 Chevrolet Avalanche 2500, 2007 Chevrolet Silverado 2500 HD Classic, 2007 Chevrolet Silverado 3500 Classic, 2001-2006 GMC Sierra 2500 HD, 2001-2006 GMC Sierra 3500, 2007 GMC Sierra 2500 HD Classic, 2007 GMC Sierra 3500 Classic, 2001-2006 GMC Yukon XL 2500, 2001-2002 Chevrolet Express 3500, and 2001-2002 GMC Savana 3500.

• Metal construction for cooling system durability
• Natural finish housing with 1.5 in. outlet port diameter
• Three mounting holes with 0.313 in. mounting hole diameter
• Gasket included for sealing at installation
• No thermostat included
• No bleeder valve and no O-rings required
• Housing neck angle: 180 degrees

Detailed Product Overview

This Dorman thermostat housing, part number 902-2060, is a direct replacement for the engine coolant thermostat housing used on select Chevrolet Silverado, Chevrolet Avalanche, Chevrolet Suburban, GMC Sierra, GMC Yukon XL, Chevrolet Express, and GMC Savana models. It is designed for the cooling system where a stable thermostat housing connection is critical to coolant flow and temperature control. The included gasket supports a proper seal at the housing-to-engine interface, while the metal body is selected for service in high-heat environments.

This part cross-references Four Seasons 85191 and Gates CO34781 for the same application.

Common Cooling System Issues

• Coolant leaks at the thermostat housing
• Cracked or warped original housing
• Corrosion or heat-related housing damage
• Improper sealing at the thermostat housing flange
• Cooling system service on GM 2500 HD, 3500, Suburban 2500, Avalanche 2500, Express 3500, and Savana 3500 applications

Installation Notes and Tips

Verify the outlet port diameter, mounting hole layout, and housing neck angle before installation. Clean the mating surfaces thoroughly, replace the thermostat if service procedures call for it, and torque fasteners to the vehicle manufacturer’s specification. Because the thermostat is not included, confirm the existing thermostat is serviceable or source the correct replacement separately.

Quality Assurance

Dorman designs this thermostat housing to match stock fit and durability requirements for the listed GM applications. The metal construction is intended to withstand repeated temperature changes in the cooling system for dependable service life.