Dorman 904-120 Fuel Injector Sleeve

Dorman 904-120 Fuel Injector Sleeve

Dorman 904-120 is a direct replacement fuel injector sleeve for select Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 diesel applications. Built from metal and rubber with an aluminum finish, it is made to match the original injector cup and seal setup for a proper service fit.

Key Features

• Direct replacement fuel injector sleeve for OE-style service
• Metal and rubber construction for sealing and durability
• Aluminum color/finish
• Paraphrased from manufacturer testing: try-on tested for fit and service life
• Fits 2001-2004 Chevrolet Silverado 2500 HD, sleeve and seal
• Fits 2001-2004 Chevrolet Silverado 3500, sleeve and seal
• Fits 2001-2004 GMC Sierra 2500 HD, sleeve and seal
• Fits 2001-2004 GMC Sierra 3500, sleeve and seal

Detailed Description

This fuel injector sleeve is built as a direct replacement for the original equipment part, making it a practical choice for injector service on 2001-2004 Chevrolet Silverado 2500 HD and Silverado 3500 trucks, as well as 2001-2004 GMC Sierra 2500 HD and Sierra 3500 models. Dorman 904-120 uses metal and rubber materials to support sealing at the injector cup interface, and its aluminum finish matches the OE-style appearance of the original component. This part cross-references 94051259 and DEC011120 for the same application.

Common Repair Uses

• Replacing a worn or damaged injector sleeve during fuel system service
• Restoring sealing at the injector cup area
• Addressing fuel leakage around the injector sleeve interface
• Correcting fitment issues caused by a deteriorated original sleeve
• Servicing injector-related drivability concerns tied to sealing wear

Installation Notes and Tips

Confirm the injector cup and seal area is clean before installation. Inspect the mating surfaces for corrosion, carbon buildup, or damage that could affect sealing. Verify application by year, make, model, and sleeve-and-seal configuration before ordering Dorman 904-120.

Quality Assurance

Dorman states that this replacement sleeve has undergone try-on testing to confirm fit and support long service life. It is built as an OE-style replacement for the listed Chevrolet and GMC diesel truck applications.