GM Service Manual Online
For 1990-2009 cars only

Special tools

    • J 45004
    • J 42960-2
    • Commercially Available Fuel Pump

Fuel Tank Draining Method 1

  1. Ignition OFF.
  2. Warning: Refer to Battery Disconnect Warning in the Preface section.

  3. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.
  4. Warning: Refer to Safety Glasses Warning in the Preface section.

    Danger: To avoid any vehicle damage, serious personal injury or death, always use the jackstands to support the vehicle when lifting the vehicle with a jack.

  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  6. Remove the right rear wheel. Refer to Tire and Wheel Removal and Installation.
  7. Warning: Refer to Gasoline/Gasoline Vapors Warning in the Preface section.


    Object Number: 2194792  Size: SH

    Warning: Never drain or store fuel in an open container. Always use an approved fuel storage container in order to reduce the chance of fire or explosion.

  8. Remove the retaining hose clamp (1) from the fuel filler hose (2).
  9. Remove the retaining hose clamp (3) from the fuel filler hose (2).
  10. Remove the fuel filler hose (2) from the vehicle.

  11. Object Number: 2195590  Size: SH

    Note: Up to approximately 36 liters (8 gallons) of residual fuel may remain in the secondary side of the fuel tank.

    Note: The J 42960-2  (2) is used to keep the roll over anti spill valve open.

  12. Install the J 42960-2  (2) into the fuel tank fuel filler pipe (1).
  13. Insert the J 45004  (3) into the J 42960-2  (2) until the J 45004  (3) reaches the bottom of the tank.
  14. Use a commercially available pump to drain the fuel from the fuel tank.

Adding The Drained Fuel to The Tank.


    Object Number: 2195590  Size: SH
  1. Remove the J 45004  (3) from the J 42960-2  (2).
  2. Remove the J 42960-2  (2) from the fuel tank fuel filler pipe (1).

  3. Object Number: 2194792  Size: SH

    Warning: Never drain or store fuel in an open container. Always use an approved fuel storage container in order to reduce the chance of fire or explosion.

  4. Install the fuel filler hose (2) to the vehicle.
  5. Caution: Refer to Fastener Caution in the Preface section.

  6. Install the retaining hose clamp (3) to the fuel filler hose (2) and tighten to 4 N·m (35 lb in).
  7. Install the retaining hose clamp (1) to the fuel filler hose (2) and tighten to 4 N·m (35 lb in).
  8. Install the right rear wheel. Refer to Tire and Wheel Removal and Installation.
  9. Lower the vehicle to the ground. Refer to Lifting and Jacking the Vehicle.
  10. Add the drained fuel to the fuel tank.
  11. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection.

Fuel Tank Draining Method 2

Special Tools

J 34730-1A

  1. Install the fuel pressure gage to the vehicle. Refer to Fuel Tank Draining.
  2. Place the bleed hose of the fuel pressure gage into a suitable container.
  3. Note: Do not leave the vehicle unattended when performing this procedure.

  4. Command the fuel pump ON with a scan tool.
  5. Note: Do not fully open the bleed valve on the fuel pressure gage. To drain both sides of the fuel tank simultaneously there should be a restriction on the flow rate at the bleed hose.

  6. Open the bleed valve on the fuel pressure gage just enough to cause a restriction to the flow of the fuel rate at the bleed hose.
  7. Note: To avoid damage to the fuel pump do not allow the fuel pump to run dry while the fuel pump is in the ON state.

  8. Command the fuel pump OFF with the scan tool as soon as it is observed that no more fuel is coming out of the bleed hose.
  9. Remove the fuel pressure gage from the vehicle. Refer to Fuel Tank Draining.