Dorman Power Steering Cooler replacement for Chevrolet GMC Cadillac 918-301 — direct-fit, corrosion-resistant

The Dorman 918-301 Power Steering Cooler is a direct-fit replacement cooler engineered to restore proper fluid cooling and match the original equipment fit on specified Chevrolet, GMC, and Cadillac trucks and SUVs.

This replacement power steering cooler is built from quality materials and designed to replicate the fit and function of the original unit on a range of GM vehicles. It helps transfer heat away from power steering fluid to maintain consistent steering performance and protect system components. Before ordering, use your vehicle trim in the garage tool to confirm exact fitment and review any fitment notes indicated by the blue “i.”

Which vehicles is this Dorman cooler compatible with?

The Dorman 918-301 is specified for many Chevrolet, GMC, and Cadillac models spanning model years primarily from the late 1990s through the late 2000s. Compatibility differs by model and year, so confirming your exact vehicle trim is essential.

• Fits Chevrolet Silverado, Suburban, Tahoe, Avalanche, and more across 1999–2010+ years listed.
• Fits GMC Sierra, Yukon, Yukon XL models for many matching years.
• Includes Cadillac Escalade, Escalade EXT, and Escalade ESV coverage for listed years.
• Always verify with the garage tool and Confirmed Fit bar before purchase.

How does this cooler help overall steering system reliability?

By shedding heat from the power steering fluid, the cooler reduces thermal stress on hoses, seals, and the steering pump. Cooler fluid preserves lubricant properties and helps reduce premature wear. This part is intended as a like-for-like replacement to restore original cooling capacity after a failure.

• Lowers fluid temperature to reduce seal deterioration and foaming.
• Helps extend life of steering pump and associated components.
• Restores original routing and connections to prevent installation complications.

What are the construction and quality highlights of the Dorman 918-301?

The cooler is manufactured from durable materials selected for heat transfer and long service life. Dorman engineers in the United States validate design and fit to align with OE expectations. The unit is intended as a reliable replacement when the factory cooler becomes damaged or clogged.

• Durable construction for corrosion resistance and thermal performance.
• Engineered to match original mounting points and hose connections.
• Backed by Dorman’s engineering support for fit and function verification.

Is installation straightforward and what should I check before fitting?

Installation is generally straightforward for anyone familiar with basic vehicle maintenance; typical steps include draining fluid, removing the old cooler, and fitting the new unit with secure clamps and routing. Check for compatibility first, inspect hoses and clamps for wear, and refill with the manufacturer-recommended power steering fluid to the correct level.

• Confirm vehicle fitment in the garage tool before removing the old cooler.
• Inspect and, if needed, replace hoses and clamps to ensure leak-free connections.
• Bleed the steering system per vehicle procedures after refilling fluid.

Who is this for: The Dorman 918-301 Power Steering Cooler is intended for owners and technicians working on compatible Chevrolet, GMC, and Cadillac trucks and SUVs who need a dependable, OEM-style replacement cooler. It’s a good choice for routine repairs, collision damage replacement, or when the original cooler has become restricted or leaking. If you’re unsure about fitment, use the site’s garage tool and confirm fit notes before ordering to ensure correct application.