GMC 2007 Sierra 1500 Pickup Owner's Manual page 335

When using the wired headphones, if the front
seat passengers play a CD in the Radio with
Six-Disc CD (if equipped) or use XM™ Satellite
Radio Service (if equipped), you will hear the audio
for these sources, instead of the DVD or CD
that is currently playing through the RSE.
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.
Both sets of rear seat headphones may include
foam ear pads that can be replaced.
Foam ear pads on these headphones may become
worn or damaged. The headphone foam ear pads
can become 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.
Battery Replacement
To change the batteries, do the following:
1. Loosen the screw on the battery compartment
door located on the left side of the headphone
earpiece.
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. Tighten the screw to close the
compartment door.
If the headphones are to be stored for a long
period of time, remove the batteries and keep them
in a cool, dry place.
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