Chevrolet 2008 Equinox Owner's Manual page 208

Audio Output
Only one audio source can be heard through the
speakers at one time. An audio source is defined
as DVD slot, CD slot, XM, FM/AM, Front Aux Jack,
or Rear Aux Jack.
Press the O button to turn the radio on. The radio
can be heard through all of the vehicle speakers.
Front seat passengers can listen to the radio (AM,
FM, or XM) by pressing the BAND button or the
DVD/CD AUX button to select CD slot, DVD slot,
front or rear auxiliary input (if available).
If a playback device is plugged into the radio's front
auxiliary input jack or the rear auxiliary jack, the
front seat passengers is able to listen to playback
from this source through the vehicle speakers.
See "Using the Auxiliary Input Jack(s)" later in this
section, or Rear Seat Entertainment (RSE) System
on page 3-99, "Audio/Video (A/V) Jacks" for more
information.
3-80
Playing an MP3/WMA CD-R
or CD-RW Disc
If you have a radio with a single CD (MP3/WMA),
a six-disc CD (MP3/WMA), or a radio with a CD and
DVD player, it is capable of playing an MP3/WMA CD-R
or CD-RW disc. For more information on how to play
an MP3/WMA CD-R or CD-RW disc, see "Using
an MP3" in the index.
CD Messages
If these messages display and/or the CD comes out,
it could be for one of the following reasons:
Optical Error: If the disc was inserted upside down.
Disk Read Error: If a disc was inserted with an invalid
or unknown format.
Player Error: If there are disc
^
or disc Z problems.