Dorman 579-054 Fuel Tank Sending Unit Lock Ring

Fuel Tank Sending Unit Lock Ring

Dorman 579-054 is a fuel tank sending unit lock ring used to secure the fuel pump assembly at the tank opening. Built from durable rubber material, it is recommended for replacement whenever the sending unit is serviced to help maintain a secure seal and stable retention.

Compatible with a wide range of Chevrolet Corvette, Cadillac XLR, Chevrolet Cobalt, Chevrolet Equinox, and Pontiac G5 applications, this lock ring supports service work on fuel tank sending unit assemblies where a twist-on cam style retention system is used.

Key Features

• Fuel tank sending unit lock ring for retaining the fuel pump assembly
• Durable rubber construction for reliable service
• 5.97 in outside diameter with 3.5 in inside diameter
• Direct replacement style for service on the tank opening
• Fits applications including Chevrolet Corvette and Cadillac XLR
• Dorman 579-054 for fuel system repair and maintenance

Detailed Description

Dorman 579-054 is a replacement fuel tank sending unit lock ring designed to hold the sending unit and fuel pump assembly securely in place at the tank. The ring measures 5.97 inches in outside diameter and 3.5 inches in inside diameter, and its rubber construction supports dependable retention during fuel system service. This part is a practical choice when servicing the sending unit on vehicles such as the Chevrolet Corvette, Cadillac XLR, and other listed GM applications. This part cross-references Spectra Premium TR7 for the same application.

What It Helps Fix

• Loose or damaged fuel pump assembly retention at the tank opening
• Fuel tank service issues involving the sending unit lock ring
• Wear-related problems with the original cam-style retaining ring
• Fuel system reassembly after sending unit replacement or inspection
• Fitment concerns on GM vehicles that use a twist-on lock ring design

Installation Notes and Tips

Install the lock ring during fuel tank sending unit service and verify the ring seats evenly before returning the vehicle to service. Confirm the tank opening, sending unit flange, and sealing surfaces are clean and undamaged before assembly. This part does not include gasket or seal material, and mounting hardware is not included.

Body fitment includes 2003-2013 Chevrolet Corvette, 2004-2008 Cadillac XLR, 2007-2008 Chevrolet Cobalt wo/California Emissions, 2005-2008 Chevrolet Equinox, 2007-2008 Pontiac G5 wo/California Emissions, and additional GM applications listed for Dorman 579-054.

Quality Assurance

Dorman manufactures replacement hardware for fuel system service with application-specific sizing and durable materials. Part number 579-054 is built for service replacement use and is listed with OE-style interchange coverage for select applications.