The doors will lock automatically when all doors are closed, the ignition is on, and the vehicle is shifted out of P (Park).
If a vehicle door is unlocked and then opened and closed, the doors will lock either when your foot is removed from the brake or the vehicle speed becomes faster than 13 km/h (8 mph).
To unlock the doors:
on the power
door lock
switch.Automatic door locking cannot be disabled. Automatic door unlocking can be programmed. See Vehicle Personalization.
Delayed Locking
Lockout Protection#07-08-49-020H: IPC Odometer Programming Method Quick Reference Guide - (Jun 5, 2013) Gauges Odometer
Subject:IPC Odometer Programming Method Quick Reference GuideModels: 2003-2014 GM Passenger Cars and TrucksAttention: This bulletin applies to vehicles sold in the U.S. and Canada Only.This bulletin is being revised to add the 2014 model year and update model list. Pleasediscard Corporate Bulletin ...