Dorman 902-5601CD Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

This Dorman engine coolant reservoir cap is a direct replacement for a cracked, missing, or worn cap on select GM vehicles. Built as a twist-on, pressurized plastic cap with a 63.5 mm diameter and 15 psi rating, it helps restore proper sealing at the coolant tank.

Compatible With applications such as Chevrolet Malibu, Chevrolet Equinox, GMC Terrain, Cadillac Escalade, and Pontiac G6, this cap is engineered for a precise OE-style fit. Part number 902-5601CD is also a practical cross-reference for service lookups and catalog matching.

Key Features

• Direct replacement engine coolant reservoir cap
• Plastic construction with black finish
• Twist-on attachment type for secure installation
• Pressurized design rated at 15 psi
• 63.5 mm diameter for proper tank sealing
• No vented design and no pressure release lever
• Fits a wide range of Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Hummer, and Oldsmobile applications

Detailed Description

Dorman 902-5601CD is engineered to replace the original coolant reservoir cap on many GM platforms, including Chevrolet Malibu, Chevrolet Equinox, and GMC Terrain applications. The cap’s pressurized twist-on design helps maintain the cooling system’s intended pressure level, which is important for consistent coolant expansion control and reservoir sealing. This part cross-references Monroe Shocks & Struts (e.g., 572.2009, 15066786) for the same application.

With fitment spanning model years from 1999 through 2017, this cap serves a broad range of vehicles including Buick Enclave, Chevrolet Traverse, Cadillac Escalade, GMC Sierra 1500, and Pontiac G6. Part number 902-5601CD is a straightforward replacement when the original cap is damaged, lost, or no longer seals correctly.

What This Part Helps Solve

• Coolant reservoir cap cracking or breakage
• Missing cap after service or repair
• Poor sealing at the coolant tank opening
• Loss of cooling system pressure retention
• Incorrect cap fit on select GM coolant reservoirs

Installation Notes and Tips

Verify the reservoir opening diameter and pressure rating before installation. This cap uses a twist-on attachment and is not vented, so it should be matched to the original application specification. Confirm vehicle fitment by year, make, and model before ordering, especially on Chevrolet Silverado 1500, GMC Yukon, and Cadillac Escalade applications.

Quality Assurance

Dorman manufactures direct replacement parts designed to match original equipment form and function. Part number 902-5601CD is built to support proper coolant reservoir sealing on the listed applications.