GM Service Manual Online
For 1990-2009 cars only

Sunroof Motor/Actuator

The sunroof motor/actuator uses sensor inputs to continuously monitor the location of the glass panel and to establish soft stop locations several millimeters ahead of the hard stops (physical limits) of the glass panel. The sunroof motor/actuator includes the sunroof motor, actuator, sensors and the control module. These components are not serviced individually.

Sunroof Motor/Actuator Replacement

If the sunroof motor/actuator is replaced, the initialization procedure must be performed in the following order:

  1. Place the ignition switch to the ON position.
  2. Press and hold the sunroof switch to the OPEN position until the glass panel stalls at the rear hard stop in the fully open position, and then moves back to the soft stop position.
  3. Release the sunroof switch.
  4. Within 6 seconds, press and hold the switch button again to the OPEN position. After 3 more seconds, the sunroof window will move toward the CLOSE position. Continue holding the switch until the sunroof window stops at the closed position.
  5. Release the sunroof switch.
  6. Verify sunroof operation. Refer to Sunroof Description and Operation .

The initialization procedure is not complete if one of the following actions occurs before the procedure is complete:

    • The sunroof switch is not held in the OPEN position.
    • The ignition switch is turned to the OFF position.
    • Battery positive voltage is removed.
    • The glass panel did not reach the fully closed position.

Sunroof Motor/Actuator Reprogramming

This component is not re-programmable.

Sunroof Motor/Actuator Re-Initialization: May Be Due To Related Component Service

If battery positive voltage or ground is removed and re-installed from the sunroof motor/actuator, the following procedure must be performed in the following order:

  1. Place the ignition switch to the ON position.
  2. Press and hold the sunroof switch to the OPEN position until the glass panel stops at the rear soft stop position.
  3. Release the sunroof switch.
  4. Press and hold the sunroof switch again to the OPEN position for 10 seconds or more. The sunroof will stall at the hard stop position, then move back to the soft stop position.
  5. Release the sunroof switch.
  6. Within 6 seconds, press and hold the sunroof switch again to the OPEN position. After 3 more seconds, the glass panel will move toward the close position. Continue pressing the switch until the glass stops at the closed position.
  7. Release the sunroof switch.
  8. Verify sunroof operation. Refer to Sunroof Description and Operation .

The re-initialization procedure is not complete if one of the following actions occur before the procedure is complete:

    • The sunroof switch is not held in the OPEN position.
    • The ignition switch is turned to the OFF position.
    • Battery positive voltage is removed.
    • The glass panel did not reach the fully closed position.