GM: Electra/Park Avenue/Ninety-Eight 1990-1993

Windshield or Rear Glass


Stationary glass replacement one of the items on a car that is best done by a professional. It is tough to accomplish satisfactory results in your backyard, and less than perfect results can be ultimately dangerous and can cause problems like water leaks, creaks and cracks. If you want to attempt it, follow the procedure exactly and work very carefully.


To reduce the risk of injury, wear safety glasses or goggles and gloves during this entire procedure. Use the specified adhesive in order to attain original installation integrity. Use of anything else could result in poor window retention and could allow unrestrained occupants to be thrown from the vehicle in the event of a collision.

  1. Remove the rear view mirror.
  3. If the reveal moulding is fastened with screws, remove them and the moulding. If screws are not used, the moulding can be pried up and pulled off. Prying a moulding usually necessitates replacement.
  5. Remove the wiper arms if necessary.
  7. Remove the air inlet screen if necessary.
  9. Remove necessary glass stops and/or retainers.
  11. Mask off the area around the glass to protect the painted surfaces.
  13. Using a razor or utility knife, make a preliminary cut around the entire perimeter of the glass, staying as close to the edge of the glass as possible.
  15. Using glass sealant remover knife J 24402-A or equivalent, cut the glass out, keeping the knife edge as close the the glass as possible. Remove the glass from the opening.

To install:

  1. Clean all traces of adhesive from the window opening. If the original glass is being reinstalled, clean it of all adhesive.
  3. Replace the glass stops and retainers that were removed.
  5. For a dry fit, position the glass in the opening, and apply a piece of masking tape over the edge of the glass and adjacent body pillars. Slit the tape vertically at the edge of the glass. (During installation, the tape on the glass can be aligned with the tape on the body to guide the glass into the desired position). Remove the glass.
  7. Clean the inside of the perimeter of the glass (where the adhesive is to be applied) with a clean, alcohol-dampened cloth and allow to air dry.
  9. Two primers are provided in gm's urethane primer kit. The clear primer is used on the glass prior to the black primer. Apply primer around the entire perimeter of the glass edge and 1 / 4 inch inboard on the inner surface. Allow to dry about 5 minutes.
  11. Apply a smooth continuous bead of adhesive on the primed edge of the glass.
  13. Install the reveal mounding with butyl tape on the top edge of the glass to retain the moulding.
  15. With the aid of a helper, lift the windshield into the window opening or use suction cups to lift the backglass into its opening.
  17. With the glass centered in the opening, place the glass on lower supports and use tape guides to place the glass in the final installation position.
  19. Press on the glass firmly to wet-out and set adhesive. Avoid excessive squeeze-out which may cause an appearance problem. Use a flat-bladed tool, paddle the material around the the edge of the glass to ensure a watertight seal. Paddle in additional material to fill in any gaps.
  21. Install any remaining glass stops.
  23. Check the installation for water-tightness. Use a hose with warm water and duplicate rainfall. Do not use a hard stream of water on fresh adhesive. Seal any leaks with additional adhesive.
  25. Install the air inlet screen, remaining mouldings, and wipers.
  27. Allow the car to remain at room temperature for at least 6 hours to complete the curing process.
  29. Install the rear view mirror after the adhesive has cured.