GMC 2010 Yukon XL Denali Owner's Manual page 182

Programming Universal Home
Remote Rolling Code
For questions or help programming the Universal
Home Remote System, call 1-866-572-2728 or go to
learcar2u.com.
Most garage door openers sold after 1996 are
Rolling 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. From inside the vehicle, press the two outside
buttons at the same time for one to two seconds,
and immediately release them.
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2. Locate in the garage, the garage door opener
receiver (motor-head unit). Locate the Learn or
Smart button. It can usually be found where
the hanging antenna wire is attached to the
motor-head unit and may be a colored button.
Press this button. After pressing this button,
complete the following steps in less than
30 seconds.