Last Door Closed Locking
WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
The last door closed locking function is a Vehicle Personalization feature that is intended to allow the doors to be locked while passengers are exiting the vehicle. When last door closed locking function is in Active Mode, the BCM will delay locking of the vehicle doors for 5 seconds after all of the doors have been closed. The last door closed locking function will be overridden in the BCM receives a door Unlock input or a key in ignition input.