Dorman 904-159 Fuel Injector Line

Reliable Fuel Injector Line for Chevrolet and GMC Trucks

The Dorman 904-159 fuel injector line is engineered to meet the demanding requirements of heavy-duty trucks. Designed specifically for Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD models, this stainless steel fuel injector line ensures consistent fuel delivery and durability under high pressure.

• Constructed from corrosion-resistant stainless steel for long-lasting performance
• Compatible with Chevrolet Silverado 2500 HD, 3500 HD and GMC Sierra 2500 HD, 3500 HD
• High-pressure rating up to 25,000 psi for reliable fuel injection
• Metric coarse threaded fittings: M16 x 1.5 inlet and M14 x 1.5 outlet
• Silver finish with precise dimensions: 13 inches and 6.7 inches length sections
• Wall thickness of 1.75 mm and inside diameter of 3 mm for optimal flow
• Includes one fuel injector line with two female steel fittings

Durable Construction and Precise Specifications

The Dorman 904-159 fuel injector line is manufactured from stainless steel, providing excellent resistance to corrosion and wear. Its silver color finish complements the engine bay while maintaining strength. The line features two female steel fittings with metric coarse threads—M16 x 1.5 on the inlet and M14 x 1.5 on the outlet—ensuring a secure and leak-free connection. With an inside diameter of 3 mm and an outside diameter of 6.5 mm, this fuel injector line supports efficient fuel flow. The wall thickness of 1.75 mm contributes to its ability to withstand pressures up to 25,000 psi, suitable for heavy-duty fuel injection systems.

Compatible Vehicles and Applications

This fuel injector line is designed for use with the following vehicles:

• Chevrolet Silverado 2500 HD
• Chevrolet Silverado 3500 HD
• GMC Sierra 2500 HD
• GMC Sierra 3500 HD

It is ideal for replacing worn or damaged fuel injector lines in these models to maintain proper fuel delivery and engine performance.

Common Issues Addressed by This Fuel Injector Line

• Fuel leaks caused by cracked or corroded injector lines
• Reduced engine performance due to inconsistent fuel pressure
• Injector line failure from exposure to high pressure and heat
• Fuel delivery interruptions affecting engine start and idle
• Replacement of damaged or worn OEM fuel injector lines

Installation Notes and Tips

Installation of the Dorman 904-159 fuel injector line requires basic mechanical skills and proper tools. Ensure the engine is cool before beginning work. Carefully remove the old injector line, noting the orientation and fitting types. Use thread sealant if recommended by the vehicle manufacturer on the metric coarse threads (M16 x 1.5 inlet and M14 x 1.5 outlet). Tighten fittings securely to prevent leaks but avoid over-tightening which can damage threads. After installation, check for leaks by running the engine and inspecting connections.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 904-159 fuel injector line undergoes rigorous quality control to ensure durability and performance under heavy-duty conditions. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship for a specified period. Refer to Dorman's warranty policy for detailed terms.