Dorman 904-935 EGR Cooler

Durable Stainless Steel EGR Cooler for Chevrolet and GMC Trucks

The Dorman 904-935 Exhaust Gas Recirculation (EGR) Cooler is engineered specifically for heavy-duty Chevrolet and GMC trucks, including the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD models. Designed to meet emission control standards, this EGR cooler helps maintain optimal engine performance and reduce harmful exhaust emissions.

Key Features of the Dorman 904-935 EGR Cooler

• Constructed from corrosion-resistant stainless steel for long-lasting durability
• Flanged ends on both sides with 4 and 2 mounting holes respectively for secure installation
• Includes necessary gaskets and seals to ensure a proper fit and prevent leaks
• Specific fitment for Chevrolet and GMC heavy-duty trucks, ensuring compatibility
• CARB certified to comply with California Air Resources Board emission standards
• Tube-type heat exchanger design for efficient exhaust gas cooling
• Overall dimensions: 15.5 inches length, 4.7 inches height, and 2.5 inches width

Detailed Description of the Dorman 904-935 EGR Cooler

This Dorman Exhaust Gas Recirculation Cooler (part number 904-935) is designed to cool exhaust gases before they re-enter the engine’s intake system, reducing nitrogen oxide emissions and improving combustion efficiency. The stainless steel construction provides resistance to high temperatures and corrosion, essential for the demanding environment of heavy-duty trucks. Both ends feature flanged connections with precise mounting hole configurations (4 holes on one end and 2 on the other) to ensure a secure and leak-free installation. The included gaskets and seals simplify replacement and help maintain system integrity.

Common Issues Addressed by the Dorman 904-935 EGR Cooler

• Overheating of exhaust gases leading to engine performance issues
• Excessive nitrogen oxide (NOx) emissions causing failed emissions tests
• Coolant leaks or contamination due to a damaged or corroded EGR cooler
• Reduced fuel efficiency from improper exhaust gas recirculation
• Check engine light triggered by EGR system faults

Installation Notes and Tips

When installing the Dorman 904-935 EGR Cooler on Chevrolet or GMC Sierra and Silverado 2500 HD and 3500 HD models, ensure all old gaskets and seals are fully removed before fitting the new cooler. Use the included gaskets to prevent leaks and verify that all mounting holes align correctly with the vehicle’s mounting points. It is recommended to inspect the EGR system components for any additional wear or damage during installation. Proper torque specifications should be followed to avoid warping or damage to the cooler.

Quality Assurance and Warranty Information

Dorman backs the 904-935 EGR Cooler with a quality assurance commitment, including compliance with CARB certification for emission control. The stainless steel material and precise manufacturing standards ensure reliable performance under heavy-duty conditions. Warranty details are provided by Dorman and typically cover defects in materials and workmanship, offering peace of mind for professional and DIY installers.