GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 34730 Fuel Pressure Gauge
    • J 43013 Fuel Injector Removal Tool/Battery

Removal Procedure

Important: The fuel injector is serviced as a complete assembly only. If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.


    Object Number: 297206  Size: SH
  1. Relieve the fuel pressure. Refer to Fuel Pressure Relief .
  2. Remove the fuel injector electrical connector from the fuel injector.
  3. Important: It may be necessary to remove the fuel rail from the intake manifold to allow increased fuel rail movement for injector access.

  4. Remove the fuel rail from the intake manifold. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  5. Remove the fuel injector up out of intake manifold using J 43013 fuel injector removal tool/battery between the bottom of injector and intake manifold.

  6. Object Number: 522658  Size: SH

    Important: It may be necessary to release the adjacent injector from the intake manifold to allow increased fuel rail movement for injector access.

  7. Spread the injector retainer clip to release injector from fuel rail.

  8. Object Number: 290215  Size: SH
  9. Remove the fuel injector assembly.
  10. Remove the fuel injector upper O-ring (3).
  11. Remove the fuel injector lower O-ring (2).
  12. Discard the injector O-ring seals.

Installation Procedure

Important: Fuel injector O-rings should always be replaced whenever fuel injectors are serviced.

Each fuel injector is calibrated for a specific flow rate. Be sure to use the correct part number when ordering replacement fuel injectors. Be sure to reinstall the correct O-ring for fuel injector. If the sealing O-ring is not seated properly, a vacuum leak is possible and driveability complaints may occur.


    Object Number: 290215  Size: SH
  1. Lubricate the new upper (3) and lower (2) O-rings with clean engine oil.
  2. Install the new upper (3) and lower (2) injector O-rings on the fuel injector.

  3. Object Number: 569009  Size: SH
  4. Install the fuel injector (2) on to fuel rail (5).
  5. • Ensure injectors (2) are aligned by orientating electrical connector.
    • Push in the retainer clip (1) far enough to engage retainer clip with machined slots on rail socket.

    Object Number: 297206  Size: SH
  6. Install the fuel rail down on to intake manifold. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  7. Install the fuel injector electrical connector to the fuel injector.
  8. Add fuel to the fuel tank.
  9. Tighten the fuel filler cap.
  10. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  11. Install the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  12. 8.1. Turn ignition ON for 2 seconds.
    8.2. Turn OFF the ignition for 10 seconds
    8.3. Turn ON the ignition.
    8.4. Check for fuel leaks.

    Object Number: 475295  Size: SH
  13. Install the fuel injector sight shield (1) to the engine.
  14. 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.

  15. Install the fuel injector sight shield nuts (2).
  16. Tighten
    Tighten the nuts to 3 N·m (27 lb in).

  17. Install the rear seat cushion. Refer to Rear Seat Cushion Replacement in Seats.