GMC Yukon Denalid Owner's Manual page 264

NO CHANGE: No change will be made to this
feature. The current setting will remain.
Choose one of the available settings and press
the set/reset button while it is displayed on the DIC
to select it.
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 124
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.
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DRIVER IN PARK: Only the driver's door will
unlock when the vehicle is shifted into PARK (P).
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 PARK (P).
NO CHANGE: No change will be made to this
feature. The current setting will remain.
Choose one of the available settings and press
the set/reset button while it is displayed on the DIC
to select it.
REMOTE DOOR LOCK
This feature allows you to select the type of
feedback you will receive when locking the vehicle
with the Remote Keyless Entry (RKE) transmitter.
You will not receive feedback when locking
the vehicle with the RKE transmitter if the doors
are open. See Remote Keyless Entry System
Operation on page 116 for more information.