GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 43178 Fuel Line Disconnect Tool

Removal Procedure


    Object Number: 856569  Size: SH
  1. Remove the 2 fasteners.
  2. Remove the 2 plastic retainers.
  3. Remove the engine cover (1) from the engine.
  4. Relieve the fuel pressure. Refer to Fuel Pressure Relief .
  5. Remove the quick connect coupling cover.

  6. Object Number: 236747  Size: SH
  7. Disconnect the coupling for the fuel feed hose from the fuel feed pipe of the fuel rail using the J 43178 . Use a shop towel in order to catch any remaining fuel that may leak. Refer to Metal Collar Quick Connect Fitting Service .

  8. Object Number: 856575  Size: SH
  9. Disconnect the breather hose from the cylinder head (1).

  10. Object Number: 856574  Size: SH
  11. Disconnect the four electrical connectors (1) from the fuel injectors.
  12. Release the three clamps (2) from the fuel Injector wire harness.
  13. Lift the fuel Injector wire harness up and away from the fuel rail.

  14. Object Number: 856571  Size: SH
  15. Remove the fastener (2) from the fuel pipe bracket.
  16. Remove the fasteners (1) from the fuel rail (7).
  17. Remove the fuel rail (7) and the spacers (3) from the engine.
  18. Remove the fuel injectors (5) with the O-rings (6) and with the grommets (4).

Installation Procedures


    Object Number: 856571  Size: SH
  1. Install new O-rings (6) and new grommets (4) on the fuel injectors (5).
  2. Apply clean engine oil to the O-rings (6) and to the grommets (4).
  3. Install the fuel injectors (5) into the fuel rail.
  4. Install the fuel rail (7) and the spacers (3) onto the engine.
  5. 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.

  6. Secure the fuel rail to the engine with the 2 fasteners (1).
  7. Tighten
    Tighten the fasteners to 19 N·m (13 lb ft).

  8. Install the fastener (2) to the fuel pipe bracket.
  9. Tighten
    Tighten the fastener to 9 N·m (80 lb in).


    Object Number: 856574  Size: SH
  10. Secure the fuel injector wire harness to the engine with the three clamps (2).
  11. Connect the fuel injector electrical connectors (1) to the four fuel injectors.

  12. Object Number: 856575  Size: SH
  13. Connect the PCV breather hose (1) to the cylinder head cover.

  14. Object Number: 624247  Size: SH
  15. Connect the quick-connect fitting (1) for the fuel feed hose to the fuel feed pipe (2) of the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
  16. Install the quick connect coupling cover.
  17. Connect the negative battery cable.
  18. Tighten
    Tighten the two battery cable fasteners to 15 N·m (11 lb in).

  19. Turn ON the ignition in order to pressurize the fuel system.
  20. Turn OFF the ignition.
  21. Inspect for fuel leaks.
  22. Repair any fuel leaks as necessary.

  23. Object Number: 856569  Size: SH
  24. Install the engine cover (1).
  25. Secure the engine cover (1) with the 2 fasteners.
  26. Tighten
    Tighten the two fasteners to 7 N·m (62 lb in).

  27. Install the 2 plastic retainers.