GM Service Manual Online
For 1990-2009 cars only

Important: If the sunroof motor is new, cycle the sunroof seven (7) times to teach the motor/actuator initialization process.

Perform the initialization/teach procedure on a reinstall motor or a new motor. Ensure the electrical harness on the headliner is connected to the sunroof motor, battery power is applied, and the ignition switch is ON.

    Important:  If the sunroof window doesn't go to the vent open position first time, release the switch and press the switch again.

  1. Press and hold the sunroof switch to the vent open position until the sunroof window stops in the vent open position.
  2. Again press and hold the sunroof switch to the vent open position for at least 10 seconds, then the window should move slightly.
  3. Verify the sunroof operation.

If the initialization/teach procedure is not carried out completely, it has to be started again.