Dorman 82597 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Dorman 82597 is a direct replacement engine coolant reservoir cap for vehicles that need a precise, factory-style fit. It is built from black plastic with a twist-on attachment and a 65.3 mm diameter for a secure seal on the reservoir neck.

Use this cap when the original reservoir cap is cracked, missing, or no longer sealing properly. It is a non-pressurized, non-vented coolant reservoir cap with no pressure release lever.

Key Features

• Direct replacement for the original engine coolant reservoir cap
• Black plastic construction
• Twist-on attachment type for straightforward installation
• 65.3 mm diameter for proper reservoir fit
• Non-pressurized and non-vented design
• Part number 82597 for easy identification

Detailed Product Information

This Dorman coolant reservoir cap is engineered to replace the factory cap on a range of GM vehicles, including Chevrolet Equinox, Chevrolet Traverse, Buick Enclave, and GMC Terrain applications. It also cross-references Autotecnica GM0613020 for the same application. The cap is intended to restore the reservoir seal after damage or loss, helping maintain the cooling system’s closed condition.

Part number 82597 is listed across multiple GM platforms and model years, including 2013-2017 Buick Enclave, 2013-2017 Chevrolet Equinox, 2013-2017 Chevrolet Traverse, and 2010-2017 GMC Terrain. Additional coverage includes Chevrolet Captiva Sport, Malibu, Silverado, Tahoe, Suburban, Express 3500, and related Cadillac, GMC, Pontiac, Saturn, Hummer, and Oldsmobile models shown in the fitment data.

What It Helps Address

• Cracked coolant reservoir cap
• Lost or missing reservoir cap
• Improper sealing at the coolant tank opening
• Visible coolant residue around the reservoir neck
• Cooling system service needs on GM vehicles

Installation Notes and Tips

Confirm the reservoir neck diameter and cap style before installation. This cap uses a twist-on design and should seat fully by hand without forcing it. Verify the application against the vehicle’s year, make, and model, especially on Chevrolet Equinox, Chevrolet Traverse, Buick Enclave, and GMC Terrain listings where multiple cooling-system configurations may exist.

Quality Assurance

Dorman manufactures direct replacement parts to match original equipment form and function. Part number 82597 is built to the listed dimensions and design specifications for the applications shown.