Lockout Prevention
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
This function is intended to prevent the vehicle operator from locking the doors if the key is left in the ignition and the driver door is open. The lockout prevention function can be overridden by the body control module (BCM) if the BCM receives a door lock input for longer than 3 seconds.