GMC 2009 Sierra 1500 Crew Cab Owner's Manual page 261

AUTO DOOR LOCK
This feature allows you to select when the vehicle's
doors will automatically lock. See Programmable
Automatic Door Locks on page 2-11 for more
information.
Press the customization button until AUTO DOOR LOCK
appears on the DIC display. Press the set/reset button
once to access the settings for this feature. Then press
the customization button to scroll through the following
settings:
SHIFT OUT OF PARK (default): The doors will
automatically lock when the vehicle is shifted out of
P (Park).
AT VEHICLE SPEED: The doors will automatically lock
when the vehicle speed is above 8 mph (13 km/h) for
three seconds.
NO CHANGE: No change will be made to this feature.
The current setting will remain.
To select a setting, press the set/reset button while the
desired setting is displayed on the DIC.
AUTO DOOR UNLOCK
This feature allows you to select whether or not to turn off
the automatic door unlocking feature. It also allows you to
select which doors and when the doors will automatically
unlock. See Programmable Automatic Door Locks on
page 2-11 for more information.
Press the customization button until AUTO DOOR
UNLOCK appears on the DIC display. Press the set/reset
button once to access the settings for this feature. Then
press the customization button to scroll through the
following settings:
OFF: None of the doors will automatically unlock.
DRIVER AT KEY OUT: Only the driver's door will
unlock when the key is taken out of the ignition.
DRIVER IN PARK: Only the driver's door will unlock
when the vehicle is shifted into P (Park).
ALL AT KEY OUT: All of the doors will unlock when
the key is taken out of the ignition.
ALL IN PARK (default): All of the doors will unlock
when the vehicle is shifted into P (Park).
NO CHANGE: No change will be made to this feature.
The current setting will remain.
To select a setting, press the set/reset button while the
desired setting is displayed on the DIC.
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