Door Lock System Controls
The power door lock system is controlled by the BCM and can be activated by any one of the following:^ A door lock switch Lock or Unlock actuation
^ A door lock cylinder switch Unlock actuation
^ A keyless entry transmitter actuation
^ An OnStar Unlock actuation using the Vehicle Interface Unit (VIU)
^ An automatic door lock actuation, refer to Vehicle Personalization in Personalization
^ An automatic door unlock actuation, refer to Vehicle Personalization in Personalization
^ A Last Door Closed Locking (LDCL) actuation, refer to Vehicle Personalization in Personalization