GM Service Manual Online
For 1990-2009 cars only
  1. Disconnect the negative battery cables. Refer to Battery Negative Cable Disconnection and Connection.
  2. Attach a hose to the drain tube on the fuel filter.
  3. Place the other end of the hose into an approved container.
  4. Drain as much fuel as possible from the fuel filter housing.
  5. Tighten the water drain on the fuel filter.