GMC 2006 Envoy Owner's Manual page 280

Problem
The auxiliary source is
running but there is no
picture or sound.
My disc is stuck in the
player. The Load/Eject
button does not work.
Sometimes the wireless
headphone audio cuts
out or buzzes.
3-136
Recommended Action
Check that the DVD
player is in the auxiliary
source mode.
Check the auxiliary
input connections at
both devices.
Turn the DVD power off,
then on, then press the
load/eject button on the
DVD player.
Do not attempt to forcibly
remove the disc from the
DVD player. This could
permanently damage the
disc and DVD player.
Check for obstructions,
low batteries, reception
range, and interference
from cellular telephone
towers or by using your
cellular telephone in the
vehicle.
Check that the
headphones are facing
the front of the vehicle.
Problem
I lost the remote and/or
the headphones.
The DVD is playing, but
there is no picture or
sound.
The audio/video skips
or jumps.
The audio from the radio
for the Radio with
Six-Disc CD and XM™
has taken over the audio
from the DVD or CD
when using the wired
headphones.
Recommended Action
See your dealer for
assistance.
Check that the DVD
player is in DVD mode.
The DVD or CD could be
dirty, scratched, or
damaged.
The RSE is working
correctly.
Use the wireless
headphones or have the
front seat passengers
listen to another audio
source.