Dorman 579-102 Fuel Tank Lock Ring

Fuel Tank Lock Ring for GM Applications

Dorman 579-102 is a fuel tank lock ring made for a direct OE-style match when servicing the fuel sending unit or fuel pump module. Built from steel with a 7.36 in lock ring diameter, it is designed for a secure fit on supported GM fuel tank openings.

Compatible with a wide range of Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, and Hummer applications, this Dorman 579-102 fuel tank lock ring supports accurate reassembly on vehicles such as the Chevrolet Silverado, GMC Sierra, and Cadillac Escalade.

Key Features

• Steel construction for durable service
• 7.36 in lock ring diameter
• Direct match for the original fuel tank lock ring
• Designed for secure retention of the sending unit or fuel pump module
• Fits many GM vehicles with 130 mm tank openings and flat ring style applications
• Cross-references Spectra Premium LO164 for the same application

Application Details

This fuel tank lock ring is used on many 2004-2019 GM vehicles, including Chevrolet Express 2500, Chevrolet Silverado 1500, GMC Savana 3500, Cadillac CTS, and Buick Enclave applications. Part number 579-102 is also referenced by OE number 10325852 for select vehicles.

What This Part Helps Address

• Loose or damaged fuel pump retaining ring
• Improper sealing at the fuel tank opening
• Difficulty securing the sending unit after service
• Corrosion or wear on the original lock ring
• Repeat fuel system service caused by a worn retaining ring

Installation Notes and Tips

Install during fuel sending unit or fuel pump service and verify the tank opening style before assembly. This part is listed for N/A position applications and many fitments note a 130 mm tank opening with flat ring style. Confirm vehicle year, make, and model before installation, especially on Chevrolet Silverado, GMC Sierra, and Cadillac Escalade platforms.

Quality Assurance

Dorman manufactures this lock ring as a direct replacement part built from durable materials for reliable service. The design follows the original part form for proper fit and retention in supported applications.