Dorman 904-120 Fuel Injector Sleeve

Reliable Fuel Injector Sleeve for Chevrolet and GMC Trucks

The Dorman 904-120 fuel injector sleeve is designed to provide a secure and durable seal for fuel injectors in heavy-duty Chevrolet and GMC trucks. Engineered with a combination of metal and rubber materials, this sleeve ensures proper injector fitment and prevents leaks in demanding conditions.

• Constructed with metal and rubber for durability and flexibility
• Aluminum finish for corrosion resistance and long service life
• Includes 2 o-rings and 1 injector cup for complete installation
• Compatible with Chevrolet Silverado 2500 HD, Silverado 3500, Sierra 2500 HD, and Sierra 3500 models
• Part number 904-120 ensures exact replacement fit

Durable Materials and Complete Package Contents

The fuel injector sleeve features a metal body combined with rubber components to provide a tight seal around the injector. The aluminum color finish offers resistance to corrosion and heat, which is critical for maintaining injector performance over time. This package includes two o-rings and one injector cup, providing all necessary hardware for a proper installation and reliable fuel delivery system operation.

Compatible Chevrolet and GMC Models

This Dorman fuel injector sleeve is specifically designed for use with Chevrolet Silverado 2500 HD, Silverado 3500, Sierra 2500 HD, and Sierra 3500 trucks. Using part number 904-120 ensures compatibility and helps maintain the integrity of the fuel injection system in these heavy-duty vehicles.

Common Applications and Problem Resolution

• Prevents fuel injector leaks caused by worn or damaged sleeves
• Eliminates poor engine performance due to improper injector sealing
• Addresses fuel odor or fuel system contamination issues
• Helps maintain optimal fuel pressure and injector alignment
• Reduces risk of injector cup damage during maintenance

Installation Notes and Tips

Before installation, ensure the fuel injector and surrounding components are clean and free of debris. Lubricate the included o-rings lightly with engine oil to ease installation and prevent damage. Carefully seat the injector cup and sleeve to avoid misalignment. Verify proper fitment on Chevrolet Silverado 2500 HD, Silverado 3500, Sierra 2500 HD, or Sierra 3500 models to ensure optimal performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 904-120 fuel injector sleeve undergoes rigorous quality control to ensure durability and reliability in heavy-duty applications. Please refer to Dorman's warranty policy for specific coverage details.