GM Service Manual Online
For 1990-2009 cars only
  1. Turn the engine OFF.
  2. Apply the parking brake.
  3. Loosen the fuel filler cap.

  4. Object Number: 64313  Size: SH
  5. Attach a flexible tube or hose 6.35-7.74 mm (1/4-5/16 in) interior diameter (ID).
  6. Place a suitable container under the filter drain.

  7. Object Number: 64302  Size: SH

    Important: Verify that the ignition is in the OFF position before opening the water drain.

  8. Slowly open the water drain valve.
  9. Allow filter to drain until clear fuel is observed.
  10. Close the drain valve.
  11. Start the engine.
  12. If the water in fuel lamps comes On again, repeat steps 1-4 until all of the water is drained from the fuel manager/filter. If water in fuel lamp keeps coming ON, the fuel tank should be checked for contamination.
  13. Dispose of the drained mixture in a proper manner.