GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Fuel Tank Replacement

Removal Procedure

    Object Number: 300318 Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
  3. Drain the fuel tank. Refer to Fuel Tank Draining .
  4. Disconnect the fuel fill pipe from the fuel fill pipe housing.
  5. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    6. Object Number: 420291 Size: SH
  6. Disconnect the fuel fill pipe ground strap.

    7. Object Number: 303981 Size: SH
  7. Remove the evaporative emission (EVAP) canister. Refer to Evaporative Emission Canister Replacement .

    8. Object Number: 303903 Size: SH
  8. Disconnect the rear fuel return pipe and the rear fuel feed pipe at the chassis fuel pipes. Refer to Plastic Collar Quick Connect Fitting Service .
  9. Cap the fuel and EVAP pipes in order to prevent possible fuel system contamination.

    10. Object Number: 373155 Size: SH
  10. Disconnect the fuel sender and the fuel pressure sensor electrical connectors.

    11. Object Number: 626413 Size: SH
  11. Remove the fuel tank shield.

    12. Object Number: 300138 Size: SH
  12. With the aid of an assistant, support the fuel tank.
  13. Remove the fuel tank strap attaching bolts.
  14. Remove the fuel tank straps.
  15. Remove the fuel tank.
  16. Place the fuel tank in a suitable work area.

    17. Object Number: 396067 Size: SH
  17. Remove the fuel feed pipe (4) and the fuel return pipe (5) from the fuel sender (2) and the retaining clips (6).
  18. Remove the EVAP pipe (1) from the fuel sender (2), the fuel tank roll over valve (3), and the retaining clips (6).

    19. Object Number: 386369 Size: MH
  19. Remove the fuel sender assembly from the fuel tank. Refer to Fuel Sender Assembly Replacement .
  20. Remove the fuel fill and vent hose and pipe assembly from the fuel tank.

Installation Procedure

    Object Number: 386369 Size: MH
  1. Install the fuel sender assembly to the fuel tank. Refer to Fuel Sender Assembly Replacement .

    2. 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.

  2. Install the fuel fill and vent hose and pipe assembly to the fuel tank.

    3. Tighten
    Tighten the hose clamp to 2.5 N·m (22 lb in).


    Object Number: 396067 Size: SH
  3. Connect the EVAP pipe (1) to the fuel sender (2), the fuel tank roll over valve (3), and the retaining clips (6).
  4. Connect the fuel feed pipe (4) and the fuel return pipe (5) to the fuel sender and the retaining clips.

    5. Object Number: 300138 Size: SH
  5. With the aid of an assistant, position and support the fuel tank.
  6. Install the fuel tank straps.
  7. Install the fuel tank strap attaching bolts.

    8. Tighten
    Tighten the bolts to 40 N·m (30 lb ft).


    Object Number: 626414 Size: SH
  8. Install the fuel tank shield to the fuel tank clips.

    9. Object Number: 626413 Size: SH
  9. Install the fuel tank shield to frame bolts.

    10. Tighten
    Tighten the bolts to 18 N·m (13 lb ft).


    Object Number: 373155 Size: SH
  10. Connect the fuel sender and the fuel pressure sensor electrical connectors.

    11. Object Number: 303903 Size: SH
  11. Remove the caps from the fuel and EVAP pipes.
  12. Connect the rear fuel return pipe and the rear fuel feed pipe at the chassis fuel pipes. Refer to Plastic Collar Quick Connect Fitting Service .

    13. Object Number: 303981 Size: SH
  13. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement .

    14. Object Number: 420291 Size: SH
  14. Connect the fuel fill pipe ground strap.

    15. Tighten
    Tighten the fuel fill pipe ground strap bolt to 9 N·m (80 lb in).

  15. Lower the vehicle.

    16. Object Number: 300318 Size: SH
  16. Connect the fuel fill pipe to the fuel fill pipe housing.

    17. Tighten
    Tighten the fuel fill pipe housing screws to 2.3 N·m (20 lb in).

  17. Refill the fuel tank.
  18. Install the fuel filler cap.
  19. Connect the negative battery cable.
  20. Inspect for leaks using the following procedure:
    21. 20.1. Turn ON the ignition, with the engine OFF, for 2 seconds.
    20.2. Turn OFF the ignition for 10 seconds.
    20.3. Turn ON the ignition, with the engine OFF.
    20.4. Inspect for fuel leaks.