GMC CHEVROLET Silverado 1500 2021 Owner's Manual page 138

Programming involves time-sensitive actions,
and may time out causing the procedure to
be repeated.
To program up to three devices:
1. Hold the end of the hand-held
transmitter about 3 to 8 cm (1 to 3 in)
away from the Universal Remote system
buttons with the indicator light in view.
The hand-held transmitter was supplied
by the manufacturer of the garage door
opener receiver.
2. At the same time, press and hold both
the hand-held transmitter button and
one of the three Universal Remote
system buttons to be used to operate
the garage door. Do not release either
button until the indicator light goes from
a slow to a rapid flashing light. Then
release both buttons.
Some garage door openers may require
substitution of Step 2 with the procedure
under Radio Signals 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.
Instruments and Controls
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.
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
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