GM Service Manual Online
For 1990-2009 cars only

    Important: After removing the sunroof glass panel inspect the position of the timing hole in the cable/cam mechanism to the front screw hole used for mounting the sunroof glass panel. The position of the timing holes must be inline to each other.

  1. Remove the sunroof glass panel. Refer to Sunroof Glass Panel Replacement .
  2. Remove the sunroof actuator. Refer to Sunroof Actuator Replacement .
  3. Align the timing hole in the cable/cam mechanism to the front screw hole used for mounting the sunroof glass panel, using a small flat bladed tool to push the cable/cam mechanism forward or rearward.
  4. Important: The sunroof timing pins must not be removed until the sunroof actuator is installed.

  5. Install the sunroof timing pins to the front screw hole used for mounting the sunroof glass panel on each side of the sunroof J 41718 .
  6. Inspect the sunroof actuator gears for proper alignment.
  7. The position of the timing hole on the white nylon gear must be located on the centerline between the two gears. This is the sunroof closed position.

    If the gears are improperly aligned follow steps 5.1 through 5.6 with the help of an assistant:

    5.1. Reconnect the electrical connectors to the sunroof actuator with out installing the sunroof actuator.
    5.2. Reconnect the electrical connector to the headliner in order to have power to the sunroof switch.
    5.3. Have the assistant operate the sunroof switch and cycle the sunroof actuator to the proper gear alignment, while you the technician hold the sunroof actuator.
    5.4. Install the sunroof actuator but do not install the headliner until after the system operation is checked. Refer to Sunroof Actuator Replacement .
    5.5. Remove the sunroof timing pins.

            Important: Do not install the sunroof glass panel.

    Slight inward or outward pressure might be required on the sunroof glass panel mounting arms to simulate the sunroof glass panel being installed.

    5.6. Have the assistant operate the sunroof switch and cycle the sunroof actuator to all the sunroof positions while you the technician watch and inspect the operation of the sunroof.
  8. Install the sunroof glass panel. Refer to Sunroof Glass Panel Replacement .
  9. Inspect the sunroof for proper sunroof glass panel adjustment and operation.
  10. Install the headliner. Refer to Headlining Trim Panel Replacement in Interior Trim.