Dorman 902-0064 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Replace a cracked, missing, or worn coolant reservoir cap with this Dorman direct replacement. Part number 902-0064 is a threaded, twist-style engine coolant reservoir cap made from black plastic with a 76.2 mm diameter for a precise service fit.

For drivers searching for a Dorman 902-0064 coolant reservoir cap for Chevrolet, GMC, or Cadillac cooling system service, this cap is built to match the original style and restore proper tank closure.

Key Features

• Direct replacement engine coolant reservoir cap for service repairs
• Threaded twist design for secure installation
• Black plastic construction
• 76.2 mm diameter and 76.2 mm width
• No vented design, no pressure release lever, and not pressurized
• Interchanges with 572.2020 and 20968839

Product Details

Dorman 902-0064 is engineered as a direct replacement for the original engine coolant reservoir cap when the factory cap is cracked, lost, or no longer sealing properly. The threaded twist design helps restore a secure closure on the coolant tank, while the plastic construction and 76.2 mm sizing support a straightforward replacement on the intended application. This part cross-references 572.2020 and 20968839 for the same application. If you are looking for a Dorman 902-0064 cap for Chevrolet Silverado, GMC Sierra, or Cadillac cooling system maintenance, this replacement is built for that type of service need.

What It Helps Solve

• Missing or broken coolant reservoir cap
• Loose cap that no longer threads on correctly
• Damaged cap housing from heat or age
• Coolant tank closure issues during routine cooling system service
• Replacement needs for Chevrolet, GMC, and Cadillac applications using this cap style

Installation Notes and Tips

Verify the cap diameter, thread style, and reservoir design before installation. Clean the tank neck and inspect the sealing surface for cracks, debris, or distortion before threading the new cap into place. For fitment-based searches, confirm the vehicle application against the original cap dimensions and OE reference numbers before ordering. Dorman 902-0064 is commonly searched for Chevrolet Silverado, GMC Sierra, and Cadillac coolant reservoir cap replacement service.

Quality Assurance

Dorman manufactures this cap as a direct replacement component for cooling system repair. The part is designed to match the original cap style and OE cross-reference numbers for the listed application.