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.

  1. Disconnect the negative battery cable.
  2. Loosen the fuel tank filler pipe cap.
  3. Block the front tires.
  4. Raise the rear of the vehical so that bottom of the rear bumper is 71cm (28 in) above the ground.
  5. Losen the fuel filler pipe connecting hose clamp at the fuel tank.
  6. Clean the fuel tank filler pipe at the fuel tank and the surrounding area before disconnecting the fuel tank filler pipe in order to avoid possible contamination of the fuel system.
  7. Wrap a shop towel around the fuel tank filler pipe and slowly remove the fuel tank filler pipe from the fuel tank .
  8. Using a socket extension,push the fuel tank filler pipe check-ball into the fuel tank.
  9. Use a hand operated fuel pump device to drain the fuel from the fuel tank.
  10. Reconnect the fuel tank filler pipe and the fuel tank filler pipe hose clamp.
  11. Un-block the front tires.
  12. Lower the vehicle.
  13. Tighten the fuel tank filler pipe cap.
  14. Reconnect the negative battery cable.