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Fuel Injectors: Installation

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Fuel injectors are not interchangeable. Each fuel injector is calibrated for a specific flow rate.
  1. Lubricate "O" ring seals on NEW fuel injector with clean engine oil. Install fuel injector into fuel meter body assembly. Install injector assembly retainer. Install injector retainer lock nuts and tighten to specification. See TORQUE SPECIFICATIONS .
  2. To complete installation, reverse removal procedure. Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.


  1. To install, reverse removal procedure. Coat NEW crossover pipe and injector "O" rings with clean engine oil. Install injector(s) into fuel rail. Install injector retainer(s). Ensure injector(s) rotate smoothly and freely. If "O" rings are installed incorrectly, injectors will bind.
  2. Apply a small amount of Threadlock (12345382) to threads on fuel rail retaining bolts. Tighten fasteners to specification. See TORQUE SPECIFICATIONS . Rotate injectors as necessary in order to avoid stretching of injector harness.
  3. To complete installation, reverse removal procedure. Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.


NOTE: When ordering new fuel injectors, ensure to order the correct injector(s) for the application being serviced.
  1. Lubricate "O" ring seals on NEW fuel injector(s) with clean engine oil. Install fuel injector(s) into fuel rail with injector electrical connector facing outwards. Install fuel injector retainer(s).
  2. Apply a small amount of Threadlock (12345382) to threads on fuel rail mounting bolts. Install fuel rail. Tighten fasteners to specification. See TORQUE SPECIFICATIONS . Rotate injectors as necessary in order to avoid stretching of injector harness.
  3. To complete installation, reverse removal procedure. Turn ignition switch to ON position for 2 seconds. Turn ignition switch to OFF position for 10 seconds. Turn ignition switch to ON position. Check for fuel leaks. Repair as necessary.
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