Dorman 904-168 EGR Cooler

Dorman 904-168 EGR Cooler for Silverado and Sierra

Dorman 904-168 is a specific-fit exhaust gas recirculation cooler for select 2004-2005 Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 applications. It uses a stainless steel spiral-tube design to improve exhaust gas cooling while reducing the clogging issues associated with the original fin-style cooler.

Key Features

• Specific-fit EGR cooler for select Chevrolet Silverado and GMC Sierra diesel applications
• Stainless steel construction with a natural finish
• Spiral tube internal design helps reduce clogging compared with the OE fin design
• CARB certified with Executive Order D740
• Includes gaskets, hoses, and hose clamps for the listed application
• Part number 904-168 for direct catalog lookup and cross-reference

Detailed Description

This Dorman OE FIX EGR cooler is engineered for vehicles that need a replacement for the original cooler design. By changing the internal flow path to spiral tubes, the cooler supports efficient exhaust gas temperature reduction while addressing a common restriction point in the factory unit. It is built from stainless steel and is shaped for a specific fit on the listed Chevrolet Silverado and GMC Sierra models. If you are searching for a 2004-2005 Silverado 2500 HD EGR cooler or a 2004-2005 Sierra 3500 EGR cooler, Dorman 904-168 is a direct replacement option for the confirmed applications.

This part cross-references Standard Ignition ECK5 for the same application.

What This Part Helps Address

• Restricted exhaust gas flow caused by a clogged EGR cooler
• Cooling loss from a damaged or inefficient original cooler
• Check engine concerns related to EGR system performance
• Exhaust gas temperature control issues in the EGR circuit
• Replacement needs for a worn or leaking cooler assembly

Installation Notes and Tips

Verify the vehicle’s year, make, and model before installation. This cooler is a specific-fit part for 2004-2005 Chevrolet Silverado 2500 HD, 2004-2005 Chevrolet Silverado 3500, 2004-2005 GMC Sierra 2500 HD, and 2004-2005 GMC Sierra 3500 applications. Confirm the inlet and outlet dimensions match the existing system, and inspect mating surfaces before installing the included gaskets and hoses. Because EGR system repairs can affect emissions performance, follow the vehicle service procedure and torque specifications for the application.

Quality Assurance

Dorman designs OE FIX components to address known weaknesses in original equipment parts while maintaining application-specific fitment. This EGR cooler is CARB certified under Executive Order D740 for the listed vehicles.