GMC 2007 Yukon XL Owner's Manual page 324

The symbol R (Right) will appear on the upper
right side, above the ear pad and should be
positioned on the right ear.
Notice: Do not store the headphones in heat
or direct sunlight. This could damage the
headphones and repairs will not be covered by
your warranty. Keep the headphones stored
in a cool, dry place.
The foam ear pads attached to the headphones
may become worn or damaged if they are
not handled or stored properly. If the foam ear
pads do become damaged or worn out, the pads
can be replaced separately from the headphone
set. It is not necessary to replace the complete
headphone set. The headphone replacement foam
ear pads can be ordered in pairs. See your
dealer for more information.
324
Battery Replacement
To change the batteries, do the following:
1. Turn the screw with a coin or screw driver to
loosen, then slide open the battery door
located on the left side of the headphones.
2. Replace the two AAA batteries in the
compartment. Make sure that they are
installed correctly, using the diagram on the
inside of the battery compartment.
3. Replace the battery door and tighten the door
screw.
If the headphones are to be stored for a long
period of time, remove the batteries and keep them
in a cool, dry place.