GM Service Manual Online
For 1990-2009 cars only

Fuel Tank Replacement Long Wheel Base

Removal Procedure

Notice: Do not attempt to straighten any kinked nylon fuel lines. Replace any kinked nylon fuel feed or return pipes in order to prevent damage to the vehicle.

  1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief .
  2. Drain the fuel tank. Refer to Fuel Tank Draining .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  4. Disconnect the fuel supply pipe quick-connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Disconnect the quick connect fitting on the evaporative emission (EVAP) purge pipe. Refer to Plastic Collar Quick Connect Fitting Service .

  6. Object Number: 49730  Size: SH
  7. Disconnect the vapor recirculation pipe from the filler tube.
  8. Disconnect the fuel filler hose at the fuel tank.
  9. Disconnect the fuel tank harness at the body pass through.
  10. Remove the fuel tank shield.

  11. Object Number: 49727  Size: SH
  12. With the aid of an assistant, support the fuel tank.
  13. Remove the fuel tank strap attaching bolts and lower the fuel tank straps.

  14. Object Number: 49733  Size: SH
  15. Remove the fuel tank from the vehicle.
  16. If the fuel tank is not being replaced, go to the installation procedure.

Disassembly Procedure


    Object Number: 1544795  Size: SH
  1. Place the fuel tank in a suitable work area.
  2. Remove the EVAP canister (2). Refer to Evaporative Emission Canister Replacement .
  3. Remove the EVAP canister vent valve (3). Refer to Evaporative Emission Canister Vent Solenoid Valve Replacement .
  4. Remove the fuel sender assembly (4). Refer to Fuel Sender Assembly Replacement .
  5. Remove the fuel feed pipe (1) from the fuel tank pipe clips.
  6. Remove the EVAP purge pipe (6) from the fuel tank pipe clip.

Assembly Procedure


    Object Number: 1544795  Size: SH
  1. Install the EVAP purge pipe (6) into the fuel tank clip.
  2. Install the fuel feed pipe (1) into the fuel tank pipe clips.
  3. Install the fuel sender assembly (4). Refer to Fuel Sender Assembly Replacement .
  4. Install the EVAP canister vent valve (3). Refer to Evaporative Emission Canister Vent Solenoid Valve Replacement .
  5. Install the EVAP canister (2). Refer to Evaporative Emission Canister Replacement .

Installation Procedure


    Object Number: 49733  Size: SH
  1. With the aid of an assistant, position and support the fuel tank.
  2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 49727  Size: SH
  3. Install the fuel tank straps.
  4. Tighten
    Tighten the fuel tank retaining straps bolts to 47.5 N·m (35 lb ft).

  5. Install the fuel tank shield.
  6. Connect the fuel tank harness at the body pass through.

  7. Object Number: 49730  Size: SH
  8. Connect the vapor recirculation pipe to the filler tube.

  9. Object Number: 49720  Size: SH
  10. Connect the fuel filler hose at the fuel tank.
  11. Tighten
    Tighten the fuel fill hose to 2.5 N·m (22 lb in).

  12. Connect the quick connect fitting on the EVAP purge pipe. Refer to Plastic Collar Quick Connect Fitting Service .
  13. Connect the quick-connect fitting on the fuel supply pipe. Refer to Plastic Collar Quick Connect Fitting Service .
  14. Lower the vehicle.

  15. Object Number: 49725  Size: SH
  16. Add fuel to the fuel tank.
  17. Install the fuel filler cap.
  18. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  19. Inspect for fuel leaks using the following procedure:
  20. 13.1. Turn ON the ignition, with the engine OFF for 2 seconds.
    13.2. Turn OFF the ignition for 10 seconds.
    13.3. Turn ON the ignition.
    13.4. Inspect the fuel system for fuel leaks.

Fuel Tank Replacement Short Wheel Base

Removal Procedure

Notice: Do not attempt to straighten any kinked nylon fuel lines. Replace any kinked nylon fuel feed or return pipes in order to prevent damage to the vehicle.

Important: Do not attempt to repair sections of nylon fuel pipes. If the nylon fuel pipes are damaged, replace the pipes.

  1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief .
  2. Drain the fuel tank. Refer to Fuel Tank Draining .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  4. Object Number: 1544794  Size: SH
  5. Disconnect the fuel supply pipe (5) quick-connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  6. Disconnect the evaporative emission (EVAP) purge pipe (6) quick-connect fitting at the EVAP canister. Refer to Plastic Collar Quick Connect Fitting Service .

  7. Object Number: 49720  Size: SH
  8. Loosen the fuel tank filler pipe hose clamp.
  9. Disconnect the fuel tank filler from the fuel tank.

  10. Object Number: 49730  Size: SH
  11. Disconnect the vapor recirculation pipe from the filler tube.
  12. Remove the fuel tank shield.

  13. Object Number: 49727  Size: SH
  14. With the aid of an assistant, support the fuel tank.
  15. Remove the fuel tank strap attaching bolts.
  16. Disconnect the fuel sender and the fuel tank pressure (FTP) sensor electrical connectors at the body pass through.

  17. Object Number: 49733  Size: SH
  18. Remove the fuel tank from the vehicle.
  19. Place the fuel tank in a suitable work area.
  20. If the fuel tank is not being replaced, go to the installation procedure.
  21. Remove the EVAP canister. Refer to Evaporative Emission Canister Replacement .

  22. Object Number: 1544794  Size: SH
  23. Disconnect the fuel feed quick-connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
  24. Remove the fuel feed pipe (5).
  25. Remove the EVAP canister vent solenoid (2).
  26. Remove the EVAP pipe assembly.
  27. Remove the fuel sender assembly (3). Refer to Fuel Sender Assembly Replacement .

Installation Procedure


    Object Number: 1544794  Size: SH
  1. Install the fuel sender assembly (3). Refer to Fuel Sender Assembly Replacement .
  2. Install the EVAP pipe assembly.
  3. Install the fuel feed pipe (5).
  4. Install the EVAP canister vent solenoid (2).
  5. Connect the quick-connect fittings . Refer to Plastic Collar Quick Connect Fitting Service .
  6. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement .

  7. Object Number: 49733  Size: SH
  8. With the aid of an assistant, position and support the fuel tank.
  9. Connect the fuel sender and the FTP sensor electrical connectors at the body pass through.
  10. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 49727  Size: SH
  11. Install the fuel tank retaining strap attaching bolts.
  12. Tighten
    Tighten the fuel tank retaining strap bolts to 47.5 N·m (35 lb ft).

  13. Install the fuel tank shield.

  14. Object Number: 49730  Size: SH
  15. Connect the vapor recirculation pipe to the fuel fill pipe.

  16. Object Number: 49720  Size: SH
  17. Connect the fuel tank filler pipe to the fuel tank.
  18. Tighten
    Tighten the fuel tank filler pipe hose clamp to 2.5 N·m (22 lb in).


    Object Number: 1544794  Size: SH
  19. Connect the fuel feed pipe (5) quick-connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  20. Connect the EVAP purge pipe (6) quick-connect fitting at the EVAP canister. Refer to Plastic Collar Quick Connect Fitting Service .
  21. Lower the vehicle.

  22. Object Number: 49725  Size: SH
  23. Add fuel.
  24. Install the fuel tank filler pipe cap.
  25. Connect the negative battery cable.
  26. Inspect for fuel leaks using the following procedure:
  27. 19.1. Turn ON the ignition for 2 seconds.
    19.2. Turn OFF the ignition for 10 seconds.
    19.3. Turn ON the ignition.
    19.4. Inspect for fuel leaks.