GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Refer to Glass and Sheet Metal Handling Caution in the Preface section.


    Object Number: 893684  Size: SH

    Notice: Care must be taken to avoid damaging paint around glass during removal.

  1. Remove the lift gate trim panel.
  2. Unsnap the center high-mount stop lamp cover.

  3. Object Number: 893699  Size: SH
  4. Unsnap the center high-mount stop lamp housing and disconnect the wire connector.

  5. Object Number: 893690  Size: SH
  6. Remove the electrical connectors from the rear window defogger bus bars. Mark both the inside and outside of the glass with tape to identify the electrical connector locations. Position the electrical connectors so not to damage the wiring/connectors when using the urethane power removal tool.

  7. Object Number: 896727  Size: SH
  8. Remove the wiper arm, finish cap, nut, and washer.
  9. Remove the spacer, shaft nut, washer, and bezel.
  10. Apply two 15 cm (6 in) pieces of duct tape to the top and bottom of the glass to prevent it from falling out when the urethane adhesive is cut.
  11. Caution: Refer to Urethane Smoke Caution in the Preface section.


    Object Number: 894102  Size: SH
  12. From the inside of the lift gate, cut the urethane around the glass using a power glass removal tool.
  13. Remove the window assembly.

Installation Procedure

    Important: Loose urethane and/or a rough surface on the remaining urethane may cause sealing problems during installation.

  1. Remove the old urethane with a razor knife leaving a thin film, approximately 1-2 mm (0.04-0.08 in) around the perimeter of the window opening and window assembly, if being reused.
  2. Clean the surface of the glass where the adhesive is to be applied with a clean, alcohol-dampened cloth. Allow to air dry.

  3. Object Number: 864691  Size: SH

    Important: Shake the glass prep primer (Clear #1) well before using.

  4. For new lift gate glass only, apply the glass prep primer (Clear #1) around the entire perimeter of the glass using a dauber. Wipe dry with a clean, lint-free cloth.
  5. Specification
    The primer area minimum width (A) is 18 mm (0.71 in).

    Important: Shake the glass primer (Black #2) well before using.

  6. With a new dauber, apply the glass primer (Black #2) around the entire perimeter over Clear #1. Allow the primer to dry 5 minutes.
  7. Specification
    The primer are minimum width (A) is 18 mm (0.71 in).

  8. Apply a smooth continuous bead of urethane adhesive around the perimeter of the lift gate glass. Apply the urethane up to the edge of the encapsulated molding.
  9. Specification

        • The bead dimension for the minimum width (B) is 8 mm (0.32 in).
        • The bead dimension for the minimum height (C) is 14 mm (0.55 in).

    Object Number: 864723  Size: SH
  10. With the aid of an assistant, align the window assembly onto the wiper module shaft. Press the glass firmly around the perimeter of the wiper module shaft and glass to wet-out and set the adhesive. Use care to avoid excessive squeeze out which would cause an appearance problem. Use tape from the glass to the lift gate to hold in position until the urethane adhesive is cured.
  11. Notice: Until the new urethane has cured, air pressure from a closing door may cause the glass to move. To prevent this, lower the opposite side door window a minimum of 76 mm (3 in) before closing the door.

  12. Watertest the vehicle using a soft spray. Use warm or hot water if available. Do not direct a hard stream of water at the fresh adhesive material. Water applied on top of the urethane adhesive, either during watertest or part of a separate operation, will speed up the cure of the urethane.
  13. Inspect for leaks from inside the vehicle. Paddle in extra adhesive at the leak points using a tongue depressor or similar flat flexible tool.

  14. Object Number: 896727  Size: SH
  15. Install the bezel, washer, shaft nut, and spacer.
  16. Install the wiper arm.
  17. Notice: Refer to Fastener Notice in the Preface section.

  18. Install the washer and nut.
  19. Tighten
    Tighten the rear wiper arm nut to 8 N·m (72 lb in).

  20. Install the wiper arm finish cap.

  21. Object Number: 893690  Size: SH
  22. Connect the rear window defogger electrical connectors to the bus bars.

  23. Object Number: 893699  Size: SH
  24. Install the center high-mount stop lamp.

  25. Object Number: 893684  Size: SH
  26. Install the center high-mount stop lamp cover.
  27. Important: The vehicle must remain at normal room temperature for 6 hours to complete the proper cure of the adhesive. Refer to the manufacturer's recommendation.

  28. Install the lift gate trim panel.