Dorman 502-518 Fuel Injector

Reliable Diesel Fuel Injector for Chevrolet and GMC Trucks

The Dorman 502-518 fuel injector is designed specifically for diesel engines in heavy-duty Chevrolet and GMC trucks. Engineered for direct injection systems, this fuel injector ensures precise fuel delivery and optimal engine performance for models like the Sierra 2500 HD and Silverado 3500 HD.

• Maximum outside diameter of 0.77 inches for precise fitment
• Compatible with diesel fuel type and direct injection systems
• Blade terminal type with 2 terminals (male) and female connector
• Includes mounting hardware and gasket/seal for secure installation
• Constructed with durable steel body and bolt-on attachment method
• Package contains 1 injector and 1 bolt for convenience
• O-ring included to ensure proper sealing and prevent leaks

Detailed Product Description

The Dorman 502-518 fuel injector is built to meet the demands of diesel-powered Chevrolet and GMC heavy-duty trucks, including the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD. Its steel body construction provides durability and resistance to wear under high-pressure direct injection conditions. The injector features a blade terminal type with two male terminals and a female connector, ensuring compatibility with the vehicle’s electrical system. The included mounting hardware and gasket or seal simplify installation and help maintain a secure, leak-free connection. With a maximum outside diameter of 0.77 inches, this injector fits precisely into the fuel injection system, supporting efficient fuel atomization and combustion.

Common Applications and Issues Addressed

• Restores proper fuel delivery in diesel direct injection engines
• Resolves rough idling and engine misfires caused by faulty injectors
• Eliminates fuel leaks with included gasket and O-ring
• Improves engine performance and fuel efficiency in Chevrolet and GMC heavy-duty trucks
• Replaces worn or damaged fuel injectors in Sierra and Silverado 2500/3500 HD models

Installation Notes and Tips

Installation of the Dorman 502-518 fuel injector requires basic mechanical skills and appropriate tools. The injector uses a bolt-on attachment method and includes one bolt and mounting hardware for secure fitting. Ensure the O-ring and gasket are properly seated to prevent fuel leaks. Disconnect the battery before installation to avoid electrical hazards. Verify terminal connections match the vehicle’s wiring harness, noting the male terminals and female connector configuration. It is recommended to inspect the fuel rail and surrounding components for wear or damage during replacement.

Quality Assurance and Warranty

Dorman fuel injectors are manufactured to meet or exceed OEM specifications for fit, form, and function. The 502-518 injector undergoes rigorous quality control to ensure reliable performance in diesel direct injection systems. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation or the supplier for exact warranty terms related to this fuel injector.