GMC Sierra Denali Classic 2007 Owner's Manual page 200

To change feature preferences, make sure the
ignition is on and the vehicle is in PARK (P).
To avoid excessive drain on the battery, it
is recommended that the headlamps are turned
off. Press the customization button to scroll
through the available customizable options.
After pressing the customization button, VEHICLE
SETTINGS will momentarily display before
going to a customization option.
Lock Doors
Press the customization button until LOCK
DOORS appears in the display. To select your
preference for automatic locking, press the select
button while LOCK DOORS is displayed on
the DIC. Pressing the select button will scroll
through the following choices:
LOCK DOORS: IN GEAR (default): The doors will
lock when the vehicle is shifted out of PARK (P).
LOCK DOORS: WITH SPEED: The doors will
lock when the vehicle speed is above
8 mph (13 km/h) for three seconds.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.
200
Unlock Doors
Press the customization button until UNLOCK
DOORS appears in the display. To select
your preference for automatic unlocking, press the
select button while UNLOCK DOORS is displayed
on the DIC. Pressing the select button will
scroll through the following choices:
UNLOCK DOORS: IN PARK (default): All of the
doors will unlock when the vehicle is shifted
into PARK (P).
UNLOCK DRIVER: IN PARK: The driver's door
will be unlocked when the vehicle is shifted
into PARK (P).
UNLOCK DOORS: KEY OUT: All of the doors
will unlock when the key is taken out of the
ignition.
UNLOCK DOORS: MANUALLY: The doors will
not be unlocked automatically.
Choose one of the available options and press the
customization button while it is displayed on the
DIC to select it and move on to the next feature.