GMC Sierra Classic 2007 Owner's Manual page 281

Press the customization button until DOOR LOCK
DELAY appears in the display. To select your
preference for delayed locking, press the select
button while DOOR LOCK DELAY is displayed on
the DIC. Pressing the select button will scroll
through the following choices:
DOOR LOCK DELAY: OFF (default): The doors
will lock immediately when pressing the power
lock switch or the lock button on the RKE
transmitter.
DOOR LOCK DELAY: ON: The doors will not
lock until five seconds after the last door is closed.
You will hear three chimes to signal that the
delayed locking feature is in use. You can
temporarily override delayed locking by pressing
the lock button on the door or the RKE transmitter
a second time.
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.
This feature will not operate if the key is in
the ignition.
Lock Feedback
Press the customization button until LOCK
FEEDBACK appears in the display. To select your
preference for the feedback you receive when
locking the vehicle with the Remote Keyless Entry
(RKE) transmitter, press the select button while
LOCK FEEDBACK is displayed on the DIC.
Pressing the select button will scroll through the
following choices:
LOCK FEEDBACK: BOTH (default): The parking
lamps will flash each time you press the button
with the lock symbol on the RKE transmitter
and the horn will chirp the second time you press
the lock button.
LOCK FEEDBACK: LAMPS: The parking lamps
will flash each time you press the button with
the lock symbol on the RKE transmitter.
LOCK FEEDBACK: HORN: The horn will chirp
the second time you press the button with the lock
symbol on the RKE transmitter.
LOCK FEEDBACK: OFF: There will be no
feedback when locking the vehicle.
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.
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