GMC 2006 Yukon XL Owner's Manual page 228

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. For more
information on automatic door locks, see Programmable
Automatic Door Locks on page 2-10.
3-68
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. For more
information on automatic door locks, see Programmable
Automatic Door Locks on page 2-10.