1993 Buick Park Avenue Owner's Manual - Page 65

From the inside: To lock the door, move the lock control on the door down. Power Door Locks Push a power door lock switch to lock or unlock all of the doors. To unlock the door, I move the lock control on the door up. I Programmable Automatic DoorLocks (Option) Just close your doors and turn on the ignition. Every time you move your shift lever out of "P" (Park) all of the doors will lock. And, every time you stop and move your shift lever into "P" (Park),your doors will unlock. If someone needs to get out while you're not in "P" (Park), have that person use the manual or power lock. When the door is closed again, it will not lock automatically. Just use the manual or power lock to lock the door again.