Actuator Replacement
WARNING: This page is about a different car, the 2006 Pontiac Torrent and 2006 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
If an actuator is replaced, the following procedure must be performed
Re-Calibrating Actuators-Refer to Re-Calibrating Actuators in HVAC Systems - Manual.