GMC 2008 Sierra 1500 Pickup Owner's Manual page 252

Battery Replacement
To change the remote control batteries, do the following:
1. Slide the rear cover back on the remote control.
2. Replace the two 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 cover.
If the remote control is to be stored for a long period of
time, remove the battery and keep it in a cool, dry place.
Problem
No power.
The picture does not fill
the screen. There are
black borders on the top
and bottom or on both
sides or it looks
stretched out.
3-116
Recommended Action
The ignition might not be
turned ON/RUN or in
ACC/ACCESSORY.
Check the display mode
settings in the setup menu
by pressing the display
menu button on the
remote control.
Problem
In auxiliary mode, the
picture moves or scrolls.
The remote control does
not work.
After stopping the player,
I push Play but sometimes
the DVD starts where I left
off and sometimes at the
beginning.
Recommended Action
Check the auxiliary input
connections at both
devices.
Check to make sure there
is no obstruction between
the remote control and the
transmitter window.
Check the batteries to
make sure they are not
dead or installed
incorrectly.
If the stop button was
pressed one time, the
DVD player resumes
playing where the DVD
was stopped. If the stop
button was pressed two
times the DVD player
begins to play from the
beginning of the DVD.