Dorman Fuel Injector Line 904-966 Direct-Fit for GM 2014–2021 — Hardened Material, Includes Mounting Hardware

Dorman 904-966 is a direct-fit replacement fuel injector line designed to match the original line and mounting hardware for select GM vehicles from 2014–2021.

If a fuel injector line on your Cadillac, Chevrolet, or GMC has been damaged, corroded, or needs replacement after servicing, the Dorman 904-966 offers a ready-to-install option engineered to the original geometry. This part arrives with vehicle-specific mounting hardware so you can install a complete injector line assembly without scavenging old brackets or clips. It’s made using a material-hardening process to resist the high pressures encountered in modern fuel systems and is intended as a cost-effective alternative to dealership parts.

Which vehicles will this fuel injector line fit?

The Dorman 904-966 is manufactured to match original fitment for a range of Cadillac, Chevrolet, and GMC applications across model years 2014 through 2021. Always confirm fit by entering your exact make, model and trim into the fitment/garage tool before ordering to ensure compatibility with your specific engine and fuel-rail layout.

• Cadillac: Escalade and Escalade ESV (2014–2018)
• Chevrolet: Camaro, Corvette, Cheyenne, Express 2500/3500, Silverado 1500/1500 LD, Suburban, Tahoe (various years listed)
• GMC: Sierra 1500/Sierra models, Savana 2500/3500, Yukon, Yukon XL (various years listed)

How is the Dorman injector line built to handle engine conditions?

Dorman constructs this injector line using hardened materials and manufacturing processes that improve pressure tolerance and longevity under normal engine conditions. The design mirrors OEM routing and connection points so flow characteristics and attachment geometry remain consistent with the original system.

• Material hardening for high-pressure resistance
• OEM-style routing and connection compatibility
• Quality-tested to meet performance expectations

What should I know about replacement procedure and seals?

Fuel injector lines typically use crush-style seals that are designed for one-time use; whenever a line is serviced or removed, the seals must be replaced or the entire line replaced to ensure a leak-free connection. Dorman supplies vehicle-specific mounting hardware with the line so the assembly can be installed correctly without reusing compromised components.

• Crushable seals are one-time-use—replace during service
• Includes mounting hardware to complete the install
• Follow manufacturer torque and safety procedures for fuel-system work

Why choose Dorman instead of dealer-sourced parts?

This Dorman replacement is positioned as a cost-effective option that meets form, fit, and function expectations for the listed vehicles while avoiding the often higher price of OEM dealer parts. It is quality-tested, shaped to match original lines, and packaged with the appropriate brackets and clips for a more straightforward installation.

• Lower cost compared to many dealership parts
• Engineered to match original fit and geometry
• Supplied with necessary vehicle-specific hardware

Who is this for: The Dorman 904-966 fuel injector line suits DIY mechanics, independent repair shops, and fleet maintenance teams who need a reliable, OEM-style replacement line for compatible Cadillac, Chevrolet, and GMC models. It’s ideal when the original line or its one-time-use seals have been compromised, when routing or mounting hardware is missing or damaged, or when seeking a value-priced alternative to dealer components. Always verify fitment for your exact year and trim before purchasing and follow safe fuel-system procedures during installation.