GM Service Manual Online
For 1990-2009 cars only
  1. Depending on where the leak is located, remove either the trim molding or the headliner in order to repair the leak.
  2. Determine the source of water entry.
  3. If water is leaking at the top edge of the windshield, reseal the windshield using the 3M Window-Weld Resealant P/N 08633 and the applicator gun 3M 06992, or the equivalent.
  4. Use a "duck bill" applicator tip in order to inject the sealant under the molded glass seal.

  5. If water is leaking into the vehicle at the sides of the glass, use the 3M Super Fast urethane auto glass sealant P/N 08609, or the equivalent.