2004 Pontiac GTO AutomaticFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: Fuel Rail Assembly & Bolts
    GM222050Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the new lower injector O-ring seals with clean engine oil.
  2. Install the new O-ring seals on the spray tip end of each injector.
  3. Install the fuel rail assembly to the intake manifold.
  4. Apply a 0.5 mm (0.020 in) band of GM P/N 12345382 (Canadian P/N 10953489) threadlock or equivalent to the threads of the fuel rail bolts.
    NOTE: Refer to the Fastener Notice in Cautions and Notices.
  5. Install the fuel rail attaching bolts.

    Tighten:  Tighten the fuel rail attaching bolts to 10 N.m (89 lb in).

  6. Connect the injector electrical connectors.
    • Install each connector on the proper injector in order to ensure correct sequential injector firing order.
    • Rotate the injectors as required in order to avoid stretching the wire harness.
  7. Connect the electrical harness to the fuel rail brackets.
    8. Fig 2: View Of Accelerator Control Cable
    GM173436Courtesy of GENERAL MOTORS CORP.
  8. Connect the accelerator cable to the throttle body and the accelerator cable bracket, if the vehicle does not have traction control.
  9. Connect the fuel feed hose to the fuel rail fuel pipe. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  10. Tighten the fuel filler cap.
  11. Connect the negative battery cable.
  12. Inspect for leaks.
    1. Turn ON the ignition for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition.
    4. Inspect for fuel leaks.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.