Dorman 579-053 Fuel Tank Sending Unit Lock Ring

Dorman 579-053 Fuel Tank Sending Unit Lock Ring

Dorman 579-053 is a metal fuel tank sending unit lock ring used to secure the fuel pump and sending unit assembly at the tank opening. It is a direct-fit service part for twist-on cam style applications on a wide range of Chevrolet, GMC, Buick, Cadillac, and Oldsmobile vehicles.

For service work on a Chevrolet Silverado 1500, GMC Sierra 2500 HD, or Chevrolet Tahoe, this lock ring provides the retaining interface needed when the sending unit is removed and reinstalled. The 579-053 part number is also referenced for common OE-style replacement needs in fuel tank service.

Key Features

• Metal construction for durable service
• Inside diameter: 3.469 in
• Outside diameter / lock ring diameter: 5.7 in
• Designed for twist-on cam style fuel tank sender retention
• Used to secure the fuel pump assembly to the tank lock
• Cross-reference: Spectra Premium TR19

Detailed Description

This fuel tank sending unit lock ring is built for vehicles that use a twist-on cam style retaining system. It holds the sending unit and fuel pump module in place at the tank opening, helping maintain a secure seal at the assembly interface when the tank service is completed. Dorman 579-053 is made from metal for reliable retention in fuel system applications and is recommended whenever the sending unit is serviced.

Compatible With 1997-2007 Chevrolet Silverado 3500, Chevrolet Blazer, GMC Jimmy, Buick Rainier, Cadillac Escalade, Chevrolet S10, Chevrolet Silverado 1500, Chevrolet Silverado 2500 HD, Chevrolet SSR, Chevrolet Trailblazer, GMC Envoy, GMC Sierra 1500, GMC Sierra 2500 HD, GMC Sierra 3500, GMC Sonoma, Oldsmobile Bravada, and related twist-on cam style applications. This part number, 579-053, is also associated with OE replacement needs for fuel tank sender retention on these platforms.

Common Repair Uses

• Broken or corroded fuel tank lock ring
• Loose fuel pump or sending unit retention
• Fuel tank service after pump or sender replacement
• Damaged cam-style retaining ring during removal
• Reassembly of twist-on fuel module installations

Installation Notes and Tips

Verify the tank opening style before installation; this ring is for twist-on cam style applications. Inspect the sealing surface and sender module tabs before reassembly, and replace worn components as needed. Mounting hardware and gasket or seal are not included.

Quality Assurance

Dorman manufactures service parts for repair and replacement applications, and this lock ring is built from durable materials for dependable fuel tank service. Part number 579-053 cross-references Spectra Premium TR19 and OE number 15036060 for the same application.