Delphi FG0121 Fuel Pump Module Assembly

Fuel Pump Module Assembly for Silverado 3500 and Sierra 3500

Delphi FG0121 is an in-tank fuel pump module assembly for select 2001-2003 Chevrolet Silverado 3500 and GMC Sierra 3500 models with an auxiliary fuel tank. Built from Delphi’s OE heritage and fuel system experience, it combines the pump, fuel level sender assembly, strainer, seal, and harness-related components needed for a direct replacement service.

For 2001-2003 Chevrolet Silverado 3500 and GMC Sierra 3500 fuel system repair, FG0121 is a standard replacement part engineered around the original application requirements.

Key Features

• In-tank electric fuel pump module assembly for gasoline applications
• Maximum pressure rating of 109.0 and system pressure of 12 psi
• Average flow rating of 22 with an average current draw of 10
• Fuel level sender assembly included for accurate tank level reporting
• Quick-connect outlet design with 3 outlets and 0.375 in. outlet outside diameter
• Internal strainer included and gasket or seal included
• Blade-style male terminals with 4 terminals
• Standard replacement construction for select Chevrolet Silverado 3500 and GMC Sierra 3500 applications

Detailed Description

Delphi FG0121 is a fuel pump module assembly for gasoline-powered trucks that use an in-tank pump layout. It is built for select 2001-2003 Chevrolet Silverado 3500 and GMC Sierra 3500 models equipped with an auxiliary fuel tank. The assembly includes the fuel pump module, float arm, seal, splices, wire harness, and instruction sheet, along with an internal strainer and fuel level sender assembly. Delphi’s OE background is reflected in the part’s application-focused design and broad aftermarket coverage.

This part cross-references Spectra Premium SP6612M for the same application. Delphi FG0121 is also referenced by part number EFG0121 in interchange listings.

What It Helps Fix

• Hard starting caused by weak fuel delivery
• Engine stalling from inconsistent pump output
• Fuel gauge readings that no longer match tank level
• Low fuel pressure conditions in the auxiliary tank system
• Noise or performance issues from a worn in-tank pump module

Installation Notes and Tips

Fits 2001-2003 Chevrolet Silverado 3500, N/A, with Auxiliary Fuel Tank. Fits 2001-2003 GMC Sierra 3500, N/A, with Auxiliary Fuel Tank. Before installing a replacement pump, clean the fuel tank to reduce the risk of contamination-related failure. Delphi recommends using fuel tank cleaning kit FC01 for this application. Verify connector style, outlet configuration, and sender compatibility before installation.

Quality Assurance

Delphi draws on more than 100 years of OE experience and supplies components to major automakers, with OE knowledge built into its aftermarket fuel system parts. FG0121 is a standard replacement fuel pump module assembly built for the specified Chevrolet Silverado 3500 and GMC Sierra 3500 applications.