Dorman 904-135 Fuel Injector O-Ring Kit

Fuel Injector O-Ring Kit for GM HD Applications

Dorman 904-135 is a fuel injector O-ring kit for specified GM gasoline engine applications. It includes durable rubber O-rings and washers selected to handle exposure to fuel, oil, and high engine temperatures during injector service.

Compatible With 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 across 2010-2016 model years.

Key Features

• Fuel injector O-ring kit for full injector seal replacement on the specified engine
• Rubber construction for sealing performance in fuel and oil exposure
• Built to withstand extreme temperature conditions in the engine bay
• Includes O-rings and washers for injector service work
• Dorman 904-135 for GM truck and van fuel system maintenance

Detailed Description

This Dorman fuel injector O-ring kit is made for service on GM heavy-duty trucks and vans, including Chevrolet Silverado 2500 HD and 3500 HD, GMC Sierra 2500 HD and 3500 HD, Chevrolet Express 2500 and 3500, and GMC Savana 2500 and 3500. The rubber sealing components are formulated for repeated exposure to fuel, oil, and elevated operating temperatures, helping restore injector sealing integrity during maintenance or repair. If you are searching for a fuel injector O-ring kit for 2011-2016 Chevrolet Silverado 2500 HD or a Dorman 904-135 replacement for GMC Sierra 3500 HD applications, this part matches the listed fitment.

This part cross-references GM OE 19256465 for the same application.

Common Issues This Part Can Address

• Fuel seepage around injector seals
• Hard starting caused by injector seal leakage
• Fuel odor from deteriorated injector O-rings
• Vacuum or pressure loss at the injector interface
• Service-related seal wear during injector removal and reinstallation

Installation Notes and Tips

Inspect the injector bore and sealing surfaces before installation. Clean all mating areas thoroughly, and replace worn or damaged seals during injector service to maintain proper sealing. Verify engine and vehicle application before ordering, since fitment is limited to the listed Chevrolet and GMC models and years.

Quality Assurance

Dorman manufactures this kit with durable materials intended for fuel system service in demanding engine environments. The sealing components are selected to resist temperature extremes as well as contact with fuel and oil.