GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2002 🢒 Park Avenue 🢒 Body and Accessories 🢒 Roof 🢒 Sunroof Replacement

Removal Procedure

    Object Number: 258904 Size: SH
  1. Remove the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.
  2. Cycle the glass 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 fastener on both sides.
  4. Cycle the glass panel to the flush or closed position.
  5. Remove the motor. Refer to Power Sunroof Motor Replacement .

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

    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 by the glass panel. Do not squeeze the module or bend the components.

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

Installation Procedure

    Object Number: 258906 Size: SH
  1. Insert the rear of the module through the roof opening. Index the module 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 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 (1) is under the clips. This will prevent noise during travel over road irregularities.
  4. Lower the glass panel into the opening.

    5. Object Number: 258905 Size: SH
  5. Install the 2 screws (1) in the sunroof motor.
  6. Install the motor. Refer to Power Sunroof Motor Replacement .
  7. Cycle the glass fully to the rear.
  8. Cycle the glass 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 (3) in order to align the sunroof module.
  10. Install the 6 screws (2).
  11. Inspect for the following conditions:
    12. • Proper operation
    • Proper fit
    • Synchronization
  12. Adjust the sunroof glass panel if necessary. Refer to Sunroof Panel Vertical Adjustment .
  13. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.