GMC 2018 Acadia Denali Owner's Manual page 154

the indicator light goes from a
slow to a rapid flash light. Then
release both buttons.
Some entry gates and garage
door openers may require
substitution of Step 2 with the
procedure under Programming
for Some Gate Operators later
in this section.
3. Press and hold the newly
programmed Universal Remote
system button for five seconds
while watching the indicator
light and garage door
activation.
If the indicator light stays on
continuously or the garage
door moves when the
button is pressed, then
programming is complete.
There is no need to
complete Steps 4 6.
If the indicator light does
not come on or the garage
door does not move, a
second button press may
be required. For a second
time, press and hold the
newly programmed button
for five seconds. If the light
stays on or the garage door
moves, programming is
complete.
If the indicator light blinks
rapidly for two seconds,
then changes to a solid light
and the garage door does
not move, continue with
programming Steps 4 6.
Learn or Smart Button
4. After completing Steps 1 3,
locate the Learn or Smart
button inside the garage on the
garage door opener receiver.
The name and color of the
button may vary by
manufacturer.
Instruments and Controls
5. Press and release the Learn or
Smart button. Step 6 must be
completed within 30 seconds of
pressing this button.
6. Inside the vehicle, press and
hold the newly programmed
Universal Remote system
button for two seconds and
then release it. If the garage
door does not move or the
lamp on the garage door
opener receiver does not flash,
press and hold the same
button a second time for
two seconds, then release it.
Again, if the door does not
move or the garage door lamp
does not flash, press and hold
the same button a third time for
two seconds, then release it.
The Universal Remote system
should now activate the
garage door.
Repeat the process for
programming the two remaining
buttons.
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