GM Service Manual Online
For 1990-2009 cars only
  1. If the power in the vehicle fails, the sunroof panel may be opened or closed.
  2. Use the J 38043 .

  3. Partially lower the headliner in order to access the motor and drive gear. Refer to Headlining Trim Panel Replacement in Interior Trim.
  4. Disengage the motor clutch in order to manually position the sunroof panel. Refer to Sunroof Actuator Replacement .
  5. Insert the J 38043 .

    Push up and rotate the tool in the desired direction.

  6. In order to engage the drive gear, turn the key in the opposite direction after opening or closing the roof. A click will be heard. This indicates that the drive gear has engaged.