GM Service Manual Online
For 1990-2009 cars only

When the sliding window panel is in the closed position, verify the following conditions:

    • The window panel is centered in the roof panel opening.
    • The lifter arms firmly hold the window panel in position.
  1. Completely or partially open the sunroof.
  2. Close the sunroof. Use the switch until the motor/actuator stops.
  3. Verify that the following conditions exist:
  4. • The sliding window panel and the motor/actuator are in the closed position.
    • The sliding window panel is approximately even with the roof panel.
    • The sliding window panel is level and centered in the roof opening.
  5. Adjust the motor synchronization if the following conditions exist:
  6. • The rear of the panel is noticeably low or high in the rear.
    • The rear of the panel is loose and may be moved up and down using your hand.
  7. If the following conditions do not exist, refer to Sunroof Window Height and Opening Fit Adjustment
  8. • The window s centered approximately in the opening.
    • The window s even with the roof panel.
    • The window s not loose at the rear.
  9. Lower the rear of the headliner in order to access sunroof motor. Refer to Headlining Trim Panel Replacement .

  10. Object Number: 258865  Size: SH
  11. Remove the sunroof motor/actuator from the sunroof module housing.
  12. Important:  Do not disconnect the electrical connection.

  13. With the motor/actuator removed from the mounting and the ignition in the ON position, move the sunroof switch to the rear position for several seconds. Release the switch.
  14. Push the switch into the forward position. Hold the switch until the motor/actuator stops.
  15. Important: Turn the ignition to the OFF position.

  16. Do not move the sunroof switch until after the motor/actuator is installed.
  17. Slide the sunshade fully rearward.
  18. Remove the 3 screws from the front edge of the shield ring.
  19. Slide the shield ring rearward.

  20. Object Number: 258870  Size: SH
  21. Locate the sunroof track transmission drive gear (1).

  22. Object Number: 258871  Size: SH
  23. Turn the sunroof track transmission drive gear clockwise or counterclockwise as required in order to align the lifter guide pin (2) with the fourth rib (1) from the rear of the lifter arm.
  24. Verify that the following conditions exist:
  25. • The lifter arms hold the rear of the window panel tightly in position.
    • The window panel cannot be moved up or down using the palm of the hand.
  26. If the glass panel is loose, inspect the tightness of the window panel mounting screws. Refer to Sunroof Window Replacement .

  27. Object Number: 258865  Size: SH
  28. Install the motor/actuator and the cover.
  29. Turn the ignition to the ON position.
  30. Verify proper operation of the sunroof by cycling the sunroof from a closed position to the vent position and a fully open position.
  31. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.