GM Service Manual Online
For 1990-2009 cars only
  1. Remove the trim moldings or the headliner in order to repair the leak, if needed. Refer to Headlining Trim Panel Replacement in Interior Trim.
  2. Determine the source of water entry.
  3. If water is leaking at the edge of the windshield, reseal the windshield using Urethane Adhesive Caulking Kit GM P/N 1234284 or the equivalent.
  4. If water leaks into the vehicle at the sides of the stationary windows, reseal the window using Urethane Adhesive Caulking Kit GM P/N 1234284 or the equivalent.