GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 LeSabre 🢒 Engine 🢒 Engine Controls - 3.8L (L36 and L67) 🢒 Fuel Tank Replacement

Removal Procedure
  1. Relieve the fuel system pressure. Refer to the 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: 891295 Size: SH
  4. Remove the wheel house filler pipe opening cover (5).
  5. Disconnect the fuel fill hose (4) from the fuel fill pipe (3).
  6. Remove the rear suspension support assembly. Refer to Rear Support Replacement in Frame and Underbody.

    7. Object Number: 483018 Size: SH
  7. Disconnect the fuel feed pipe (4) and the fuel return pipe (1). Refer to Plastic Collar Quick Connect Fitting Service .

    8. Object Number: 104621 Size: SH
  8. Disconnect the evaporative emission (EVAP) pipe (2) from the EVAP canister.

    9. Object Number: 684413 Size: SH
  9. Remove the fuel and EVAP retainer from the frame.

    10. Object Number: 684415 Size: SH
  10. Disconnect the fuel tank electrical connector.
  11. Disconnect the fuel tank electrical harness from the retainers.

    12. Object Number: 104646 Size: SH
  12. Remove the fuel tank strap bolts (4).
  13. Remove the fuel tank (5).

Disassemble Procedure

    Object Number: 681724 Size: SH
  1. If the fuel tank is not being replaced, refer to the Installation Procedure.
  2. Remove the fuel pipes (2, 3) and the EVAP pipe (1).
  3. Remove the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .

    4. Object Number: 104599 Size: SH
  4. Remove the fuel filler hose clamp (2).
  5. Remove the fuel filler hose from the fuel tank (3).

Assemble Procedure

    Object Number: 104599 Size: SH
  1. Install the fuel filler hose to the fuel tank (3). Align the dot on the hose to the parting line on the fuel tank.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the fuel filler hose clamp (2).

    3. Tighten
    Tighten the clamp to 3.5 N·m (31 lb in).


    Object Number: 681724 Size: SH
  3. Install the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
  4. Install the fuel pipes (2, 3) and the EVAP pipe (1).

Installation Procedure

    Object Number: 104646 Size: SH
  1. Position and support the fuel tank (5) with the aid of an assistant.
  2. Install the fuel tank straps (2).

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the fuel tank strap bolts (4).

    4. Tighten
    Tighten the fuel tank strap bolts to 42 N·m (31 lb ft).


    Object Number: 684415 Size: SH
  4. Connect the fuel tank electrical connector.
  5. Install the fuel tank electrical harness into the retainers.

    6. Object Number: 684413 Size: SH
  6. Install the fuel and EVAP retainer to the frame.

    7. Object Number: 104621 Size: SH
  7. Connect the EVAP pipe (2) to the EVAP canister.

    8. Object Number: 483018 Size: SH
  8. Connect the fuel feed pipe (4) and the fuel return pipe (1). Refer to Plastic Collar Quick Connect Fitting Service .
  9. Install the rear suspension support assembly. Refer to Rear Support Replacement in Frame and Underbody.

    10. Object Number: 891295 Size: SH
  10. Connect the fuel filler hose (4) to the fuel filler pipe (3).

    11. Tighten
    Tighten the clamp to 3.5 N·m (31 lb in).

  11. Install the wheelhouse filler pipe opening cover (5).
  12. Lower the vehicle.
  13. Add fuel to the fuel tank.
  14. Install the fuel tank filler pipe cap.
  15. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  16. Inspect for leaks.
    17. 16.1. Turn ON the ignition switch for 2 seconds.
    16.2. Turn OFF the ignition switch for 10 seconds.
    16.3. Turn ON the ignition switch.
    16.4. Inspect for fuel leaks.
  17. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.