GM Service Manual Online
For 1990-2009 cars only

This feature allows the driver to delay the actual locking of the doors. When the driver power door lock switch is pressed with the key removed from the ignition, and the driver door open, a chime will sound three times to signal that the delayed locking system is active. When all doors have been closed, the doors will lock automatically after several seconds. If any door is opened before this, the timer will reset itself once all the doors have been closed again.

Pressing the driver or passenger power door lock switch again or the RKE transmitter button will override this feature.

Personal Choice Programming

The delayed locking feature can be turned on or off, using the Driver Information Center (DIC) to program this feature. See "DELAY DOOR LOCK" under DIC Vehicle Customization.