Chevrolet Avalanche Owner's Manual page 216

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 remote keyless entry transmitter.
DOOR LOCK DELAY: ON: The doors will not lock
until five seconds after the last door or the tailgate 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 remote keyless entry
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.
3-60
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 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 remote keyless entry 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 remote keyless entry transmitter.
LOCK FEEDBACK: HORN: The horn will chirp the
second time you press the button with the lock symbol
on the remote keyless entry 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.