GMC 2012 Sierra Denali Owner's Manual page 230

7-48 Infotainment System
Sometimes the wireless headphone audio cuts out or
buzzes.
The remote and/or the headphones are lost.
The DVD is playing, but there is no picture or sound.
DVD Display Error Messages
The DVD display error message
depends on the radio that is in the
vehicle. The video screen can
display one of the following:
Disc Load/Eject Error: This
message displays when there are
disc load or eject problems.
Disc Format Error: This message
displays if the disc is inserted with
the disc label wrong side up, or if
the disc is damaged.
Tips and Troubleshooting Chart (cont'd)
Problem
Disc Region Error: This message
displays if the disc is not from a
correct region.
No Disc Inserted: This message
displays if no disc is present when
EJECT or DVD AUX is pressed on
the radio.
DVD Distortion
Video distortion can occur when
operating cellular phones, scanners,
CB radios, Global Position Systems
(GPS)*, two-way radios, mobile fax
machines, or walkie talkies.
Recommended Action
Check for obstructions, low batteries, reception range,
and interference from cellular telephone towers, or use a
cellular telephone in the vehicle.
Check that the headphones are on correctly using the
L (left) and R (right) on the headphones.
See your dealer for assistance.
Check that the RSE video screen is sourced to the DVD
player.
It might be necessary to turn off the
DVD player when operating one of
these devices in or near the vehicle.
*Excludes the OnStar® System.
Cleaning the RSE Overhead
Console
When cleaning the RSE overhead
console surface, use only a clean
cloth dampened with clean water.