GM Service Manual Online
For 1990-2009 cars only

Important: The track and motor must be synchronized after removal of either component.

With the sliding sunroof window in the closed position, verify that the following conditions exist:

    • The sunroof window is centered in the roof panel opening.
    • The lifter arms firmly hold the window in position.
  1. Completely or partially open the sunroof.
  2. Close the sunroof. Use the switch until the motor stops.
  3. Verify that the following conditions exist:
  4. • The sliding sunroof window and the sunroof actuator motor are in the closed position.
    • The sliding window is approximately even with the roof panel.
    • The sliding window is level and centered in the roof opening.
  5. Adjust the actuator 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 the palm of the hand.
  7. If the following conditions do not exist, Refer to Sunroof Panel Vertical Adjustment and Sunroof Panel Horizontal Adjustment :
  8. • The sunroof window is centered approximately in the opening.
    • The sunroof window is even with the roof panel.
    • The sunroof window is not loose at the rear.
  9. Lower the front of the headliner in order to access sunroof actuator. Refer to Headlining Trim Panel Replacement in Interior Trim.

  10. Object Number: 258865  Size: SH

    Important: Do not disconnect the electrical connection.

  11. Remove the sunroof actuator from the sunroof module.
  12. With the actuator motor removed from the sunroof module assembly and the ignition in the ON position, move the sunroof switch to the rear position for several seconds.
  13. Release the switch.

  14. Push the switch into the forward position.
  15. Hold the switch until the motor stops.

    Important: Do not move the sunroof switch until after the actuator is re-installed.

  16. Turn the ignition to the OFF position.
  17. Slide the sunshade fully rearward.
  18. Remove the 3 screws from the front edge of the sunroof panel window cam.
  19. Slide the sunroof panel window cam 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 needed 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 tightly in position.
    • The window cannot be moved up or down by using the palm of the hand.
  26. If the window is loose, inspect the tightness of the window mounting screws.

  27. Object Number: 258865  Size: SH
  28. Install the sunroof actuator motor to the module assembly. Refer to Power Sunroof Motor Replacement .
  29. Turn the ignition to the ON position.
  30. Verify the proper operation of the sunroof by cycling the sunroof from a closed position to the vent position, and to a full open position.
  31. Close the sunroof window.
  32. Position the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.