Cadillac Automobile Owner's Manual page 218

To change the remote control
batteries:
1. Slide the rear cover back on the
remote control.
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.
There is no power.
The picture does not fill the screen.
There are black borders on the top
and bottom or on both sides, or the
picture looks stretched out.
In auxiliary mode, the picture moves
or scrolls.
The remote control does not work.
The ignition might not be turned to
ON/RUN or ACC/ACCESSORY.
Check the display mode settings in
the setup menu by pressing the
display menu button on the remote
control.
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.