GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: Use care when removing and installing the headliner. If reusing the headliner lay the headliner down flat on a clean surface. Excessive bending will damage the headliner.


    Object Number: 258904  Size: SH
  1. Lower 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.

  4. Remove the 8 screws (2) from the cover plates. Start with the rear most screw on both sides.
  5. Cycle the glass panel to the closed position.
  6. Remove the motor. Refer to Power Sunroof Motor Replacement .

  7. Object Number: 258905  Size: SH
  8. Remove the 2 transmission screws (1) at the rear of the sunroof housing.

  9. Object Number: 258906  Size: SH

    Important: 

       • In order to prevent damage to the finish, mask the roof panel in front of the sunroof opening using masking tape and paper.
       • Handle the module by the glass panel. Do not squeeze the module or bend the components.

  10. Remove the sunroof module (1) by lifting up and forward.

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.

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

  6. Object Number: 258905  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the 2 screws (1) in the transmission.
  8. Tighten
    Tighten the transmission screws (1) to 3 N·m (27 lb in).

  9. Install the motor. Refer to Power Sunroof Motor Replacement .
  10. Cycle the glass fully to the rear.
  11. Cycle the glass forward 3 mm (0.125 in) in order to remove the load from the bumpers.

  12. Object Number: 258904  Size: SH
  13. Install the 2 rear screws (one per side) in the module (3) in order to align the unit.
  14. Install the 6 screws (2).
  15. Inspect for the following conditions:
  16. • Proper operation
    • Proper fit
    • Synchronization
  17. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.