Dorman Fuel Injector Line 904-966 Compatible with Cadillac/Chevrolet/GMC — Direct-Fit, Reinforced

Replacement fuel injector line engineered to match OEM fit and function for specified Cadillac, Chevrolet and GMC vehicles.

This Dorman 904-966 fuel injector line is a direct-fit replacement built to restore proper fuel rail routing and sealing on a range of GM vehicles. It arrives with the vehicle-specific mounting hardware required for a complete swap, and Dorman’s material-hardening process increases resistance to the high pressures and heat found in modern fuel systems. Before ordering, use your vehicle’s make, model and trim in the garage tool to verify compatibility.

How will this fuel injector line fit my vehicle?

The 904-966 is manufactured to mirror the original equipment geometry and mounting points so it installs without modification on compatible models. It includes any vehicle-specific clips or brackets so the line aligns with the fuel rail and injector ports exactly as the factory part did.

• Direct replacement design matching OEM routing and attachment points
• Includes vehicle-specific mounting hardware when required
• Fits a long list of Cadillac, Chevrolet and GMC model years—confirm with the garage tool

What materials and protection does this replacement use?

Dorman applies a material-hardening process to the fuel line to improve durability under pressure and elevated temperatures. The construction is intended to resist wear, corrosion and the stresses of repeated thermal cycling common in engine compartments.

• Reinforced material to withstand high fuel pressures
• Corrosion-resistant surface treatments to extend service life
• Manufactured and tested to meet aftermarket quality standards

Why is replacing the entire line necessary?

Fuel injector lines use crushable seals at connection points that compress once during installation to create a leak-free joint. Because those seals cannot be reliably reused, replacing the entire line ensures a proper seal and dependable fuel delivery after service.

• Crush-style sealing fittings require new parts for a reliable seal
• Replacing the full line avoids partial repairs that can lead to leaks
• Factory-style connections help maintain correct injector pressures

How does this compare to dealership parts and what should I expect from installation?

Dorman’s replacement provides a cost-effective alternative to dealer-sourced lines while aiming to match fit and function. Installation typically follows the same procedure as the original part; expect to replace crush fittings and follow torque and safety guidelines when working with the fuel system.

• Often more affordable than OEM dealership parts with equivalent fitment intent
• Sold with necessary mounting hardware for ease of installation
• Standard vehicle service precautions apply—depressurize the fuel system and replace crush seals

Who is this for? The Dorman 904-966 fuel injector line is designed for DIY mechanics, independent shops and fleet managers who need a reliable, OEM-style replacement for specified Cadillac, Chevrolet and GMC vehicles. It’s ideal for anyone replacing fuel lines that have failed, for preventative renewal on high-mileage engines, or when original crush fittings must be replaced. Always confirm exact vehicle fit with the garage tool and follow safe fuel-system service practices during installation.