GMC Yukon XL 2013 Owner's Manual page 181

Most garage door openers sold
before 1996 are Fixed Code units.
Programming a garage door opener
involves time-sensitive actions, so
read the entire procedure before
starting. Otherwise, the device will
time out and the procedure will have
to be repeated.
To program up to three devices:
1. To verify that the garage door
opener is a Fixed Code unit,
remove the battery cover on the
hand-held transmitter supplied
by the manufacturer of the
garage door opener motor.
If there is a row of dip switches
similar to the graphic above, the
garage door opener is a Fixed
Code unit. If you do not see a
row of dip switches, return to the
previous section for
Programming Universal Home
Remote Rolling Code.
Your hand-held transmitter can
have between 8 to 12 dip
switches depending on the
brand of transmitter.
Instruments and Controls
The garage door opener receiver
(motor head unit) could also
have a row of dip switches that
can be used when programming
the Universal Home Remote.
If the total number of switches
on the motor head and
hand-held transmitter are
different, or if the dip switch
settings are different, use the dip
switch settings on the motor
head unit to program the
Universal Home Remote. The
motor head dip switch settings
can also be used when the
original hand-held transmitter is
not available.
Example of Eight Dip Switches
with Two Positions
5-55