GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Park Avenue 🢒 Body and Accessories 🢒 Roof 🢒 Sunroof Module Assembly Replacement

Removal Procedure

    Object Number: 258904 Size: SH
  1. Remove the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.
  2. Cycle the sunroof window panel to the rear.

    3. Important: Do not remove the fine-thread machine screws (4) second from the rear. Identify the screws from the inside of the vehicle.

  3. Remove the 8 screws  (2) from the cover plates. Start with the rear most screw on both sides.
  4. Cycle the window panel to the flush or closed position.
  5. Remove the motor/actuator. Refer to Sunroof Motor/Actuator Replacement .

    6. Object Number: 258905 Size: SH
  6. Remove the 2 motor screws (1) at the rear of the sunroof module assembly.

    7. Object Number: 258906 Size: SH

    Notice: In order to prevent damage to the paint, mask the roof panel in front of the sunroof opening using masking tape and paper.

    Important: Handle the module assembly by the window panel. Do not squeeze the module or bend the components.

  7. Remove the sunroof module assembly (1) by lifting up and forward.
  8. Remove the sunroof module assembly from the vehicle.

Installation Procedure

    Object Number: 258906 Size: SH
  1. Insert the rear of the module assembly through the roof opening. Index the module assembly on the raised guides on the track.
  2. Slide the module (1) into the sunroof opening. Do not damage the finish at the front of the opening.

    3. As you slide the module assembly under the rear retaining clips, you will feel resistance during the last 6-9 cm (2-3 in) of travel.

  3. Verify that the module assembly (1) is under the clips. This will prevent noise during travel over road irregularities.
  4. Lower the window panel into the opening.

    5. Object Number: 258905 Size: SH
  5. Install the 2 screws (1) in the sunroof motor/actuator.
  6. Install the motor/actuator. Refer to Sunroof Motor/Actuator Replacement .
  7. Cycle the sunroof window fully to the rear.
  8. Cycle the window forward 3 mm (0.125 in) in order to remove the load from the bumpers.

    9. Object Number: 258904 Size: SH
  9. Install the 2 rear screws (one per side) in the module assembly (3) in order to align the sunroof module assembly to the inner roof panel.
  10. Install the 6 screws (2).
  11. Inspect for the following conditions:
    12. • Proper operation
    • Proper fit
    • Synchronization
  12. Adjust the sunroof window if necessary. Refer to Sunroof Window Height and Opening Fit Adjustment .
  13. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.