GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 877765  Size: SH
  1. Remove the left and right outer trim covers. Refer to Instrument Panel Outer Trim Cover Replacement in Instrument Panel, Gages, and Console.

  2. Object Number: 877771  Size: SH
  3. Pull out on the accessory trim plate in order to release the retaining fasteners.

  4. Object Number: 877774  Size: SH
  5. Disconnect the accessory trim plate electrical connector(s).

  6. Object Number: 877802  Size: SH
  7. Remove the screw retaining the cluster trim plate to the center trim panel.
  8. Lift up on the cluster trim plate to release the retaining fasteners.
  9. Remove the cluster trim plate.
  10. Remove the left and right windshield garnish moldings. Refer to Windshield Garnish Molding Replacement in Interior Trim.

  11. Object Number: 877812  Size: SH
  12. Remove the defroster grille bolt covers.

  13. Object Number: 877803  Size: SH
  14. Remove the defroster grille center bolts and the outer screws.
  15. Lift up on the defroster grille to release the retaining fasteners.

  16. Object Number: 877737  Size: SH
  17. Turn the ambient light sensor body clockwise to remove it from the defroster grille.
  18. Disconnect the ambient light sensor electrical connector.

Installation Procedure


    Object Number: 877737  Size: SH
  1. Connect the ambient light sensor electrical connector.
  2. Install the ambient light sensor to the defroster grille. Turn the ambient light sensor body counterclockwise to lock it into the defroster grille.

  3. Object Number: 877803  Size: SH
  4. Align the defroster grille retaining fasteners with the I/P.
  5. Push on the defroster grille in order to secure the retaining fasteners.
  6. Notice: Refer to Fastener Notice in the Preface section.

  7. Install the defroster grille center bolts.
  8. Tighten
    Tighten the defroster grille center bolts to 10 N·m (88 lb in).

  9. Install the defroster grille outer screws.
  10. Tighten
    Tighten the defroster grille outer screws to 2.5 N·m (22 lb in).


    Object Number: 877812  Size: SH
  11. Install the defroster grille bolt covers.
  12. Install the left and right windshield garnish moldings. Refer to Windshield Garnish Molding Replacement in Interior Trim.

  13. Object Number: 877802  Size: SH
  14. Align the cluster trim plate retaining fasteners with the center trim panel.
  15. Push on the outer edge of the cluster trim plate in order to secure the retaining fasteners.
  16. Install the screw retaining the cluster trim plate to the center trim panel.
  17. Tighten
    Tighten the cluster trim plate screw to 2.5 N·m (22 lb in).


    Object Number: 877774  Size: SH
  18. Connect the accessory trim plate electrical connector(s).

  19. Object Number: 877771  Size: SH
  20. Align the retaining fasteners with the I/P.
  21. Push on the outer edge of the accessory trim plate in order to secure the retaining fasteners.

  22. Object Number: 877765  Size: SH
  23. Install the left and right outer trim covers. Refer to Instrument Panel Outer Trim Cover Replacement in Instrument Panel, Gages, and Console.