Dorman Power Steering Cooler 918-301 — Direct-Fit for Chevy, GMC & Cadillac Trucks/SUVs

The Dorman 918-301 Power Steering Cooler is a direct-fit replacement cooler engineered to match the original equipment fit and function for many Chevrolet, GMC and Cadillac trucks and SUVs.

This replacement power steering cooler is built from quality materials to restore the cooling capacity of your steering system and help maintain consistent hydraulic fluid temperatures under towing, hauling or everyday driving. It’s manufactured to the specifications of the original cooler so it installs in the same mounting points and connects to existing lines without extensive modification. Before buying, confirm your vehicle’s year and trim with the garage tool to ensure proper fitment.

What vehicles will this Dorman cooler fit?

This cooler is designed for a range of GM full-size trucks and SUVs from the late 1990s through the 2010s. Fitment covers various model years and trims for Chevrolet, GMC and Cadillac vehicles; always verify your exact model and year with the product’s Confirmed Fit tool to avoid mismatches.

• Compatible with Chevrolet Silverado, Suburban, Tahoe, Avalanche and select HD models across 1999–2007 years
• Fits GMC Sierra, Yukon and Sierra HD variants from 1999–2007 depending on model
• Listed for Cadillac Escalade, Escalade EXT and Escalade ESV for specified model years
• Use the listing’s garage tool and look for the Confirmed Fit indicator before purchase

How does this cooler improve power steering performance?

By replacing a worn or leaking cooler, the Dorman unit restores the system’s ability to remove heat from power steering fluid. Cooler fluid temperatures help maintain consistent steering feel and protect hoses, seals and the power steering pump from heat-related wear.

• Helps stabilize hydraulic fluid temperature during towing and heavy loads
• Reduces thermal stress on seals and pump components
• Prevents overheating-related steering feel changes or reduced system life

Is installation straightforward and what should I prepare?

Installation is intended to be a direct replacement using the original mounting points and line connections. Basic mechanical skills and common hand tools are usually sufficient; some models may require minor line routing or bracket transfer from the old cooler.

• Prepare a drain pan and replace any worn hoses or clamps while accessible
• Bleed the steering system per vehicle manufacturer instructions after installation
• Confirm bracket orientation and hardware from the original cooler to ensure proper fit

What are the construction and warranty expectations for the Dorman cooler?

This cooler is manufactured with durable components intended for long service life and is engineered by Dorman’s U.S.-based product team. It’s positioned as a reliable replacement part rather than an upgraded performance cooler; check the seller or product page for specific warranty details.

• Durable materials matched to the original cooler’s performance
• Engineered and supported by Dorman product engineers in the United States
• Sold as a direct replacement—verify warranty and return policy from the merchant

Who is this for: The Dorman 918-301 Power Steering Cooler is for owners of compatible Chevrolet, GMC and Cadillac trucks or SUVs who need a reliable OE-style replacement for a leaking, damaged or underperforming steering cooler. It’s suitable for do-it-yourself mechanics and professional technicians who want a direct-fit part that reinstates the steering system’s thermal management without custom modifications. Always confirm vehicle year and trim with the garage fit tool before ordering.