Dorman 667-439 Turbocharger Coolant Line - Return

Turbocharger Coolant Line for HD Diesel Applications

Dorman 667-439 is a turbocharger coolant return line built to match the fit and function of the original line on specified vehicles. It is made from stainless steel with molded rubber fittings and is shaped as an OEM-style assembly for dependable coolant routing in turbocharged heavy-duty trucks.

Compatible With 2017-2022 Chevrolet Silverado 2500 HD, return; 2017-2022 Chevrolet Silverado 3500 HD, return; 2017-2022 GMC Sierra 2500 HD, return; and 2017-2022 GMC Sierra 3500 HD, return. This part cross-references OE number 12691899 for the same application.

Key Features

• Part number: Dorman 667-439
• Turbocharger coolant return line for return-side routing
• Stainless steel line construction for durability
• OEM-style molded assembly
• Female inlet and outlet fittings
• Black rubber fitting material with metallic gray and black finish details
• Threaded fitting design: no
• Centerline length: 9 in.

Detailed Description

This turbocharger coolant line is engineered as a direct replacement for the original coolant return line used on select Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models. Dorman 667-439 is built from stainless steel and uses molded, OEM-style construction to help maintain proper coolant flow between turbocharger components and the cooling system. The female-to-female configuration and 14 mm x 10 end 1 thread diameter support the specified factory-style connection points.

For buyers searching for a turbocharger coolant line for 2017-2022 Chevrolet Silverado 2500 HD return applications or a GMC Sierra 3500 HD turbo coolant return line, this part provides a vehicle-specific replacement option. Dorman 667-439 is also listed as a replacement for OE part number 12691899.

What It Helps Address

• Coolant leaks at the turbocharger return line
• Cracked, corroded, or damaged factory coolant tubing
• Restricted coolant flow through a worn return line
• Fitment issues caused by an incorrect replacement line
• Service needs on turbocharged HD truck cooling circuits

Installation Notes and Tips

Verify the vehicle year, make, model, and return-line application before installation. Confirm the female fittings and 14 mm x 10 thread diameter match the original connection points on the vehicle. Inspect adjoining seals, clamps, and mating surfaces for wear or contamination before installing the new line.

Quality Assurance

Dorman designs this coolant line to match original fit and function on the listed applications. The stainless steel construction and molded assembly format are selected to support reliable performance and durability in turbocharger cooling service.