If you have trouble programming the universal
transmitter, make sure that you have followed the
directions exactly as described and that the battery in the
hand-held transmitter is not dead. If you still cannot
program it, rotate the hand-held transmitter end over end
and try again. The universal transmitter may not work
with older garage door openers that do not meet current
Federal Consumer Safety Standards. If you cannot
program the transmitter after repeated attempts, consult
your
GM
dealer.
Be sure to keep the original hand-held transmitter in case
you need to erase and reprogram the universal transmitter.
Operating the Transmitter
Press and hold the appropriate button on the universal
transmitter. The red light comes on while the signal is
being transmitted.
Note that the effective transmission range of the
universal transmitter may differ from the hand-held
transmitter and from one channel to another.
Erasing Channels
To erase all three programmed channels, hold down the
two outside buttons until the red light begins to flash.
Individual channels cannot be erased, but can be
reprogrammed using the procedure for programming the
transmitter explained earlier.
Training a Garage Opener with a “Rolling
Code” Feature
If
you programmed the universal transmitter, but the
garage door will not open, and
if
your garage door opener
was manufactured after
1995,
your garage door may have
a
security
feature that changes the “code” of your garage
door opener every time it is opened or closed.
To determine if your garage door opener has this
“rolling code” feature, press the appropriate button on
the universal transmitter that was programmed. If the
red light flashes rapidly for one to two seconds, then
turns solid, your garage door opener has this feature.
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