GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    • J 34730-1A Fuel Pressure Gauge
    • J 39765 Fuel Sender Lock Nut Wrench

    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.

  1. Disconnect the negative battery cable.
  2. Drain the fuel from the tank. Refer to Fuel Tank Draining .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  4. Object Number: 616996  Size: SH
  5. Loosen the fuel fill hose clamp (2) and the vent hose clamp (3) at the fuel fill and vent pipe.
  6. Disconnect the fuel fill hose and the vent hose from the fuel fill and vent pipe.

  7. Object Number: 17515  Size: MH
  8. Remove the fuel tank shield.

  9. Object Number: 331713  Size: SH
  10. Disconnect the fuel pressure sensor and the fuel sender electrical connectors.
  11. Disconnect the fuel feed pipe, the fuel return pipe, and the EVAP pipe at the fuel sender.

  12. Object Number: 616668  Size: SH
  13. Support the fuel tank.
  14. Remove the fuel tank straps (1,5).
  15. Notice: Ensure that the connections to both roll over valves are disconnected prior to lowering the fuel tank more than 51 mm (2 in). The roll over valves are located at both the front and rear of the fuel tank.

  16. Disconnect the EVAP pipes from the rollover valves.
  17. Notice: Use extreme care when lowering the fuel tank. The fuel sender is made of plastic. Lowering the fuel tank may damage the fuel sender.

  18. Lower the fuel tank.

  19. Object Number: 331709  Size: SH
  20. Remove the fuel sender from the fuel tank. Refer to Fuel Sender Assembly Replacement .

Installation Procedure


    Object Number: 331709  Size: SH
  1. Install the fuel sender into the fuel tank. Refer to Fuel Sender Assembly Replacement .
  2. Install the fuel tank insulators.

  3. Object Number: 616668  Size: SH
  4. With the aid of an assistant, position and support the fuel tank.
  5. Raise the fuel tank.
  6. Connect the EVAP pipes to the rollover valves.
  7. 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.

    Important: When removing or replacing the fuel tank, the fuel tank support fasteners should never be reused. Always use new fasteners when installing the fuel tank.

  8. Install the fuel tank straps.
  9. Tighten

        • Tighten the fuel tank strap nut (3) to 18 N·m (13 lb ft.).
        • Tighten the fuel tank strap bolt (2) to 18 N·m (13 lb ft.).

    Object Number: 331713  Size: SH
  10. Connect the fuel feed pipe, the fuel return pipe, and the EVAP pipe at the fuel sender.
  11. Connect the fuel pressure sensor and the fuel sender electrical connectors.

  12. Object Number: 616996  Size: SH
  13. Connect the fuel fill hose and the vent hose to the fuel fill and vent pipe.
  14. Tighten

        • Tighten the fuel fill hose clamp (2) to 2.5 N·m (22 lb in).
        • Tighten the vent hose clamp (3) to 1.7 N·m (15 lb in).

    Object Number: 17515  Size: MH
  15. Install the fuel tank shield.
  16. Tighten
    Tighten the fuel tank shield bolts (2) to 33 N·m (24 lb ft).

  17. Lower the vehicle.
  18. Refill the fuel tank.
  19. Install the fuel tank filler cap.
  20. Connect the negative battery cable.
  21. Inspect for leaks.
  22. 15.1. Turn ON the ignition for 2 seconds.
    15.2. Turn OFF the ignition for 10 seconds.
    15.3. Turn ON the ignition.
    15.4. Inspect for fuel leaks.