Dorman 502-554 Diesel Fuel Injector Pump

Dorman 502-554 Diesel Fuel Injector Pump

Dorman 502-554 is a remanufactured mechanical diesel fuel injector pump built for consistent fuel delivery and dependable operation. It is a direct-fit option for select Chevrolet Express, Silverado, GMC Savana, and Sierra diesel applications from 2006-2010.

Key Features

• Remanufactured using a controlled process for quality and reliability
• Critical internal components are replaced during rebuilding
• Clearances are verified after cleaning, reassembly, and testing
• Mechanical pump design for diesel fuel injection systems
• Female connector with 1 connector, 2 male terminals, and blade terminal type
• Gasket or seal included for installation
• 3-port configuration

Detailed Description

This Dorman diesel fuel injector pump, part number 502-554, is built for vehicles that rely on precise mechanical fuel delivery. The remanufacturing process replaces worn critical components and verifies internal clearances after the unit is cleaned, assembled, and tested. That approach supports stable injector pump performance in diesel fuel injection systems on Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Savana 2500, GMC Savana 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications.

This part cross-references Standard Ignition IP24 for the same application.

Common Issues This Pump May Address

• Hard starting caused by inconsistent diesel fuel delivery
• Rough idle related to pump wear or internal leakage
• Loss of power from reduced injection pressure
• Fuel system performance problems tied to a failing mechanical pump
• Driveability concerns on high-mileage diesel trucks and vans

Installation Notes and Tips

Verify connector style, terminal count, port count, and gasket/seal requirements before installation. This pump uses a mechanical design with a female connector, blade terminals, and no wiring harness included. Confirm vehicle-specific diesel fuel system service procedures for Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, and other listed applications before removal and replacement.

Quality Assurance

Dorman remanufactures this pump through a process that includes component replacement, cleaning, reassembly, and testing to help maintain consistent quality and reliability. Part number 502-554 is built to meet the needs of select 2006-2010 Chevrolet and GMC diesel applications.