Handles, Locks, Latches and Entry Systems - System Operation and Component Description: Auto-Unlock

NOTE: The doors do not auto-unlock if the vehicle has been electronically locked before the driver door is unlocked.

The auto-unlock feature unlocks all of the doors when all of the following conditions have been met:

All the doors are closed and locked.
The ignition was on.
The vehicle was shifted out of park and a speed greater than 20 km/h (12.4 mph) was achieved.
The vehicle has come to a stop.
The ignition transitions to accessory or off and, within 10 minutes, the driver door is opened.

The auto-unlock feature can be enabled/disabled through the message center.