Dorman 918-478 Power Steering Cooler

Power Steering Cooler for Silverado and Sierra HD

Dorman 918-478 is a direct replacement power steering cooler for select Chevrolet Silverado 2500 HD and Silverado 3500 HD, as well as GMC Sierra 2500 HD and Sierra 3500 HD models from 2020-2022. It addresses failures caused by corroded, bent, or broken wire-style fins by using a stacked-fin aluminum design for improved durability and longer service life.

Key Features

• OE FIX design replaces the original power steering cooler with a more durable stacked-fin construction
• Aluminum cooler body with black finish
• Push-in fittings with 6 mm inside diameter and 9 mm outside diameter
• Overall dimensions: 35.7 in. length, 36 in. height, 7.2 in. width, and 14.75 in. thickness
• Fits 2020-2022 Chevrolet Silverado 2500 HD and Silverado 3500 HD
• Fits 2020-2022 GMC Sierra 2500 HD and Sierra 3500 HD
• Part number 918-478 for easy identification and ordering

Detailed Description

This Dorman power steering cooler is built for vehicles that need a replacement for the factory cooler used on heavy-duty Chevrolet and GMC trucks. The stacked-fin aluminum construction helps resist the corrosion and physical damage that can affect wire-style fin coolers, making it a practical service part for Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, and Sierra 3500 HD applications. If you are searching for a 2020-2022 Chevrolet Silverado 2500 HD power steering cooler or a 2020-2022 GMC Sierra 3500 HD power steering cooler, Dorman 918-478 matches the listed fitment and connection style.

This part cross-references 84763090 for the same application.

What It Helps Fix

• Power steering cooler fin corrosion
• Bent or broken cooler fins
• Reduced cooling performance in the power steering circuit
• Heat buildup in the steering fluid system
• Replacement needs after damage to the original cooler

Installation Notes and Tips

Verify the vehicle year, make, and model before installation. Confirm the push-in fitting size and cooler dimensions against the original unit on the truck. Inspect the surrounding power steering lines and mounting points for wear or damage before installing the replacement cooler.

Quality Assurance

Dorman OE FIX components are engineered as upgraded replacements for common original-equipment failure points, using a more robust stacked-fin design to improve durability in service.