GMC Envoy 2003 Owner's Manual page 220

Battery Replacement
To change the batteries, do the following:
1. Unclip the battery door located on the back of the
remote control.
2. Replace the two AAA batteries in the compartment.
Make sure that they are installed correctly.
3. Close the battery door securely.
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.
Problem
No power.
Disc will not play.
3-100
Recommended Action
The ignition might be off.
The parental control
button might have been
pressed. (The power LED
will flash.)
The Input/Title on the
remote might be set for
auxiliary.
The disc is upside down
or is not compatible.
Problem
No sound.
The picture is distorted
during fast forward or fast
reverse.
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.
Recommended Action
The volume on the
headphones could be too
low. Adjust it on the wired
headphones on the front
panel or the remote. For
the wireless headphones,
adjust the dial on the right
earpiece on the
headphones.
This is normal for this
operation.
Quickly press and release
the SIZE/ANGLE button
on the remote. This will fill
the screen. If the screen
looks stretched out, press
and release the SIZE/
ANGLE button again. If
there are borders on the
top and bottom, the movie
may have been made that
way for a standard screen.
Pressing the SIZE/
ANGLE button should fill
the sides.