Delayed Locking
When this feature is enabled and the doors are locked with the power lock switch on the instrument panel or front door panels, three chimes sound to signal that the delayed locking feature is in use. All doors lock five seconds after the last door is closed.
When the delayed locking feature is in use, pressing 
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instrument panel or front door panels, or the RKE transmitter will override the
feature and lock all doors immediately.
This feature can be programmed by using the Driver Information Center (DIC). See “Delayed Door Lock” in Vehicle Personalization. The delayed locking feature is only available if “Unlocked Door Anti-Lockout” is disabled.
See also:
Control Buttons
The buttons used to control the radio are:
RADIO/BAND: Press to turn the radio on and choose between AM, FM, and XM™,
if equipped.
MENU/SELECT: Press and turn to navigate the available menus.
...
Safety Locks
Rear door safety locks prevent passengers from opening the rear doors from
the inside.
Press to activate the safety locks, the LED in the switch illuminates.
Press to deactivate the safety ...
Different Size Tires and Wheels
If wheels or tires are installed that are a different size than the original
equipment wheels and tires, vehicle performance, including its braking, ride
and handling characteristics, stability, and ...