2011 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 52

2-8 Keys, Doors and Windows and a door is open, the doors will lock five seconds after the last door is closed. You will hear three chimes to signal that the delayed locking feature is in use. Pressing the power lock switch twice will override the delayed locking feature and immediately lock all the doors. This feature will not operate if the key is in the ignition. This feature can be programmed using the Driver Information Center (DIC). See "Delay Door Lock" under Vehicle Personalization (with DIC Buttons) on page 5‑50. Power Door Locks With power door locks, the switches on the front doors can be used to lock and unlock the vehicle. Lockout Protection If the driver side power door lock switch is pressed when the driver door is open and the key is in the ignition, all of the doors will lock and then the driver door will unlock. If the passenger side power door lock switch is pressed when the front passenger door is open and the key is in the ignition, all of the doors will lock and then the front passenger door will unlock. Safety Locks The vehicle has rear door security locks to prevent passengers from opening the rear doors from the inside. K (Unlock): doors. Press to unlock the Automatic Door Locks The vehicle may have an automatic lock/unlock feature. This feature can be programmed using the Driver Information Center (DIC). See Vehicle Personalization (with DIC Buttons) on page 5‑50 for more information on DIC programming. Q (Lock): Press to lock the doors. Delayed Locking The vehicle may have the delayed locking feature. When locking the doors with the power lock switch