GMC 2014 Yukon/Yukon XL Owner's Manual page 229

If the vehicle has a third row video
screen, the AUX button controls the
source display on the second row
video screen, and the third row
video screen as described in the
table below:
Default DVD
State (No Media
Press)
First Aux Video
Press Source
Second DVD
Press Media
Third Aux Video
Press Source
Fourth Return to
Press Default
State
change camera angles on DVDs
that have this feature while a DVD is
playing. The format and content of
this function vary for each disc.
The numeric keypad provides the
capability of direct chapter or track
number selection.
DVD
Media
three seconds after entering a
numeric selection, to clear all
numerical inputs.
Aux Video
Source
this button to select chapter or track
Aux Video
numbers greater than nine. Press
Source
this button before entering the
DVD
number.
Media
Return to
To change the remote control
Default
batteries:
State
1. Slide the rear cover back on the
remote control.
Press this button to
Press this button within
Press
2. Replace the two batteries in the
compartment. Make sure they
are installed correctly using the
diagram on the inside of the
remote control.
3. Replace the battery cover.
If the remote control is to be stored
for a long period of time, remove the
batteries and keep them in a cool,
dry place.