GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 575657  Size: SH

    Caution: In order to reduce the risk of fire and personal injury observe the following items:

       • Replace all nylon fuel pipes that are nicked, scratched or damaged during installation, do not attempt to repair the sections of the nylon fuel pipes
       • Do not hammer directly on the fuel harness body clips when installing new fuel pipes. Damage to the nylon pipes may result in a fuel leak.
       • Always cover nylon vapor pipes with a wet towel before using a torch near them. Also, never expose the vehicle to temperatures higher than 115°C (239°F) for more than one hour, or more than 90°C (194°F) for any extended period.
       • Apply a few drops of clean engine oil to the male pipe ends before connecting fuel pipe fittings. This will ensure proper reconnection and prevent a possible fuel leak. (During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.)

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Clean all the fuel pipe connections and areas surrounding the fuel pipe connections before disconnecting the fuel pipe connections in order to avoid possible contamination of the fuel system.
  3. Disconnect the fuel pipes (2, 3) at the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
  4. Disconnect the evaporative emission (EVAP) purge pipe (4) at the EVAP canister purge valve.
  5. Remove the fuel and EVAP pipes from the retainers (1).
  6. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  7. Object Number: 483018  Size: SH
  8. Disconnect the fuel return pipe quick-connect fitting (1). Refer to Plastic Collar Quick Connect Fitting Service .
  9. Disconnect the EVAP purge pipe (2) at the EVAP canister.
  10. Disconnect the threaded fitting from the fuel filter (3) outlet.
  11. Cap the fuel filter, the fuel feed pipe and the fuel return pipe as needed to stop any fuel leakage.

  12. Object Number: 681468  Size: SH
  13. Remove the fuel and EVAP pipe bundle.

Installation Procedure


    Object Number: 681468  Size: SH
  1. Install the fuel and EVAP pipe bundle.
  2. Remove the caps from the fuel filter, the fuel feed pipe and the fuel return pipe.

  3. Object Number: 483018  Size: SH
  4. Connect the fuel return pipe quick-connect fitting (1). Refer to Plastic Collar Quick Connect Fitting Service .
  5. Connect the EVAP purge pipe (2) at the EVAP canister.
  6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Connect the threaded fitting to the fuel filter (3) outlet. Use a back-up wrench in order to prevent the fuel filter from turning.
  8. Tighten
    Tighten the fuel filter fitting to 30 N·m (22  lb ft).

  9. Lower the vehicle.

  10. Object Number: 575657  Size: SH
  11. Connect the fuel pipes (2, 3) at the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
  12. Connect the EVAP purge pipe (4) at the EVAP canister purge valve.
  13. Install the fuel and EVAP pipes into the retainers (1).
  14. Tighten the fuel tank filler pipe cap.
  15. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  16. Perform the following procedure in order to inspect for leaks:
  17. 12.1. Turn ON the ignition, with the engine OFF for 2 seconds.
    12.2. Turn OFF the ignition for 10 seconds.
    12.3. Turn ON the ignition, with the engine OFF.
    12.4. Inspect for fuel leaks.
  18. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.