GM Service Manual Online
For 1990-2009 cars only
  1. Remove the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.
  2. Notice: If the screws are too loose, it is possible that the glass panel will scratch the roof panel.

  3. Slightly loosen the sunroof module fasteners.
  4. Align the sunroof module by cycling the glass open and closed. In the closed position, the glass will center the module fasteners.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. With the glass fully closed, tighten the sunroof module fasteners.
  7. Tighten
    Tighten the sunroof-to-roof panel fasteners to 12 N·m (8 lb ft).

  8. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.