GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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. Remove the negative battery cable.
  2. Remove the fuel tank filler cap.
  3. Remove the fuel from tank.
  4. Remove the sender assembly electrical connector.

  5. Object Number: 319507  Size: SH
  6. Remove the fuel feed and return the pipe quick-connect fittings at fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  7. Support the fuel tank using a suitable lifting device.

  8. Object Number: 347636  Size: SH
  9. Remove the front and rear brace bolts (9), nuts (5) and the washers (4) from the front and rear brace (6).
  10. Remove the fuel tank support bolts (11), nuts (3) and the washers (2) from the each support (10).
  11. Lower the fuel tank.

  12. Object Number: 319507  Size: SH
  13. Remove the six nuts and washers retaining the fuel sender (2) assembly lock ring.
  14. Remove the lock ring, sender assembly, and seal.
  15. Discard the old seal.


    Object Number: 318435  Size: SH
  16. Remove the fuel tank strap nuts (2) and washers (1).
  17. Raise and secure the straps.

  18. Remove the tank from the support brackets.
  19. Purge the tank if it is being serviced.

Installation Procedure

  1. Install the new seal, sender assembly, and lock ring.
  2. Make sure the alignment tab on the fuel sender assembly meets the tab opening in the locking ring.

    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.


    Object Number: 319507  Size: SH
  3. Install the six nuts and washers retaining the fuel sender assembly lock ring (2).
  4. Tighten
    Tighten the nuts to 13 N·m (10 lb ft).


    Object Number: 318435  Size: SH
  5. Place the fuel tank into the support brackets.
  6. Install the fuel tank straps, nuts (2) and the washers (1).
  7. Tighten
    Tighten the nuts to 24 N·m (18 lb ft.).


    Object Number: 347636  Size: SH
  8. Place the fuel tank on a suitable lifting device.
  9. Raise the fuel tank and slide into position.

  10. Install the support bracket bolts (11), nuts (3) and the washers (2) to the frame.
  11. Tighten
    Tighten the nuts to 78 N·m (57 lb ft).

  12. Install the front and rear brace (6) attaching hardware.

  13. Object Number: 319507  Size: SH
  14. Reconnect the fuel feed, the return, (1) quick connect fitting to fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  15. Connect the fuel sender assembly electrical connector.
  16. Fill the tank with fuel.
  17. Install the fuel tank filler cap.
  18. Connect the negative battery cable.
  19. Inspect the fuel lines for leaks.
  20. Using a scan tool, command the fuel lift pump ON and check for leaks.