GMC 2003 Safari Owner's Manual page 115

5. Press and hold the newly-trained HomeLink@ button
and observe the indicator light.
If the indicator light stays on constantly,
programming is complete and your device should
activate when the HomeLink@ button is pressed
and released.
To program the remaining two HomeLink@ buttons,
begin with Step 2 under "Programming HomeLink@."
Do not repeat Step 1 as this will erase all of the
programmed channels.
If the indicator light blinks rapidly for two seconds
and then turns to a constant light, continue with
Steps 6 through 8 following to complete the
programming of a rolling-code equipped device
(most commonly, a garage door opener).
6. At the garage door opener receiver (motor-head
unit) in the garage, locate the "Learn" or "Smart"
button. This can usually be found where the hanging
antenna wire is attached to the motor-head unit.
7. Firmly press and release the "Learn" or "Smart"
button. The name and color of the button may
vary by manufacturer.
You will have 30 seconds to start Step 8.
8. Return to the vehicle. Firmly press and hold the
programmed HomeLink@ button for two seconds,
then release. Repeat the press/hold/release
sequence a second time, and depending on the
brand of the garage door opener (or other rolling
code device), repeat this sequence a third time
to complete the programming.
HomeLink@ should now activate your rolling code
equipped device.
To program the remaining two HomeLink@ buttons,
begin with Step 2 of "Programming HomeLink@."
Do not repeat Step 1.
Gate Operator and Canadian
Programming
Canadian radio-frequency laws require transmitter
signals to "time out" or quit after several seconds
of transmission. This may not be long enough for
HomeLink@ to pick up the signal during programming.
Similarly, some U.S. gate operators are manufactured
to "time out" in the same manner.
If you live in Canada, or you are having difficulty
programming a gate operator by using the
"Programming HomeLink@" procedures (regardless of
where you live), replace Step 3 under "Programming
HomeLink@" with the following:
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