2004 Chevrolet Monte Carlo LSFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    NOTE:
    • Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.
    • Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components.
    • Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.
  1. Replace any damaged O-ring seals that were removed.
  2. Lubricate the O-ring seals with clean engine oil.
  3. Install the fuel rail assembly into the intake manifold. Tilt the fuel rail assembly slightly to install the injectors.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the fuel rail bolts.

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

    5. Fig 1: Installing Fuel Rail Assembly
    GM531027Courtesy of GENERAL MOTORS CORP.
  5. Install the fuel injector electrical wiring harness to the fuel rail.
    Fig 2: View Of ECT Sensor, Connector And Wiring Harness At Fuel Rail
    GM15986Courtesy of GENERAL MOTORS CORP.
  6. Connect the ECT sensor electrical connector.
  7. Connect the fuel injector electrical connectors.
  8. Push the slide locks (2) into position.
    9. Fig 3: Identifying Lock Release
    GM372749Courtesy of GENERAL MOTORS CORP.
  9. Connect the main fuel injector electrical harness connector.
  10. Install the new O-rings on the fuel feed and the fuel return pipes.
  11. Install the fuel feed pipe to the fuel rail.

    Tighten:  Tighten the fuel feed pipe nut to 17 N.m (13 lb ft).

    12. Fig 4: Installing Fuel Feed Pipe
    GM22505Courtesy of GENERAL MOTORS CORP.
  12. Install the fuel return pipe to the fuel pressure regulator.

    Tighten:  Tighten the fuel return pipe nut to 17 N.m (13 lb ft).

    13. Fig 5: View Of Fuel Return Pipe
    GM22507Courtesy of GENERAL MOTORS CORP.
  13. Install the upper intake manifold. Refer to Intake Manifold Replacement - Upper in Engine Mechanical - 3.4L.
  14. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  15. Inspect for fuel leaks with the following procedure:
    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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.