GM Service Manual Online
For 1990-2009 cars only

Draining Procedure

Caution: Do not drain the fuel into an open container. Never store the fuel in an open container due to the possibility of a fire or an explosion.

Notice: Do not drain fuel through the fuel tank filler pipe in order to prevent damage to the fuel tank filler pipe check-ball.

    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. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

  3. Object Number: 66012  Size: SH
  4. Remove the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
  5. Use a hand operated fuel pump device in order to drain the fuel through the fuel sender access panel.
  6. Install the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
  7. Add fuel and tighten the fuel tank filler pipe cap.
  8. Reconnect the negative battery cable.
  9. Inspect for leaks.
  10. 8.1. Turn the ignition switch on for 2 seconds.
    8.2. Turn the ignition switch off for 10 seconds.
    8.3. Turn the ignition switch on.
    8.4. Inspect for fuel leaks.