FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

Automatic Door Lock/Unlock

When the ignition is in the RUN position, all doors are closed, and the vehicle is shifted out of park, the BCM will lock all the doors. When the vehicle is shifted into park, all doors will unlock. The unlock portion of this feature can be disabled either by using the TECH 2, or by key FOB sequence. Refer to Programming the Receiver in wiring systems.