Dorman 54218CD Engine Coolant Reservoir Cap

Direct Replacement Coolant Reservoir Cap

Restore a secure seal on the cooling system with this Dorman engine coolant reservoir cap. It is engineered as a direct replacement for a cracked, missing, or worn original cap, helping maintain proper reservoir closure on a wide range of GM vehicles.

Part number 54218CD is built for straightforward replacement on applications such as Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade models.

Key Features

• Direct replacement engine coolant reservoir cap for select GM applications
• Engineered to match the original fit and function
• Helps restore a proper seal at the coolant reservoir
• Designed for vehicles that use a pressurized reservoir cap application
• Cross-reference: GM 13502353

Detailed Description

Dorman 54218CD is a replacement coolant reservoir cap made to match the original equipment design for specific Buick, Cadillac, Chevrolet, and GMC vehicles. When the factory cap is cracked, lost, or no longer sealing correctly, this part provides a direct-fit solution that helps return the cooling system reservoir to normal operation. It is a practical replacement for drivers servicing models including Chevrolet Tahoe, GMC Yukon, and Cadillac XT5, as well as many other listed applications.

This cap is intended for vehicles across the 2007-2024 model years, with fitment varying by make and model. Always verify the exact application before installation to ensure the correct reservoir cap style and pressure rating are selected for the vehicle.

What It Helps Solve

• Broken or cracked coolant reservoir cap
• Lost or missing reservoir cap
• Poor sealing at the coolant tank opening
• Cooling system service after cap damage or wear
• Replacement needs on GM trucks, SUVs, and cars with the listed fitment

Installation Notes and Tips

Inspect the reservoir neck and sealing surface before installation. Remove the old cap, confirm the replacement matches the original style, and install it by hand until fully seated. For best results, verify fitment against the vehicle’s year, make, and model before service.

Quality Assurance

Dorman designs this coolant reservoir cap as a direct replacement part for the specified applications. Part number 54218CD is built to align with original fit and function requirements for the listed vehicles.