Dorman 82724 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Dorman 82724 is a direct replacement engine coolant reservoir cap for vehicles that use a 55 mm, black, snap-on style cap. It is built from plastic with a flip-top design and a non-pressurized, non-vented construction for a clean OE-style fit on the reservoir.

Use this Dorman coolant reservoir cap when the original cap is cracked, missing, or no longer sealing properly. It is a straightforward replacement for applications such as the Buick Enclave, Chevrolet Traverse, and GMC Acadia, and it also fits a wide range of GM cars and trucks across the listed model years.

Key Features

• Direct replacement engine coolant reservoir cap
• 55 mm diameter for the specified reservoir opening
• Black plastic construction
• Snap-on attachment with flip-top design
• Non-pressurized and non-vented
• Engineered for the listed GM applications
• Dorman 82724 for OE-style service replacement

Detailed Description

This coolant reservoir cap is designed to restore the sealing function of the engine coolant reservoir on the listed vehicles without changing the original setup. The press-on attachment and flip-top layout support a simple replacement on reservoirs that use a 55 mm cap. Dorman 82724 is a practical service part for drivers looking for a replacement coolant reservoir cap for a 2008-2017 Buick Enclave, 2009-2017 Chevrolet Traverse, or 2007-2016 GMC Acadia, along with other confirmed GM fitments.

This part cross-references GM 10322539 for the same application.

What It Helps Fix

• Cracked coolant reservoir cap
• Lost or missing reservoir cap
• Loose cap that no longer stays seated
• Visible coolant residue around the reservoir opening
• Improper sealing at the coolant reservoir neck

Installation Notes and Tips

Confirm the reservoir uses a 55 mm snap-on, non-pressurized cap before installation. Inspect the reservoir neck and sealing surface for damage, dirt, or coolant buildup, then install the cap fully seated by hand. Verify the cap style matches the vehicle application, especially on GM models such as the Buick Enclave, Chevrolet Traverse, and GMC Acadia.

Quality Assurance

Dorman manufactures this replacement cap as a direct-fit service part for the listed applications. Part number 82724 is built to match the original cap style and dimensions for the confirmed fitment range.