GMC Express 2011 Owner's Manual page 192

7-18 Infotainment System
To change from playback by artist to
playback by album:
1. Press the softkey located below
the Sort By tab.
2. Press one of the softkeys below
the Album tab from the sort
screen.
3. Press the softkey below the
Back tab to return to the main
music navigator screen.
The album name displays on the
second line between the arrows,
and songs from the current album
begin to play. Once all songs from
that album have played, the player
moves to the next album in
alphabetical order on the CD and
begins playing MP3's from that
album.
To exit music navigator mode, press
the softkey below the Back tab to
return to normal MP3 playback.
CD Player Messages
CHECK DISC: If this message
displays and/or the CD ejects, it
could be for one of the following
reasons:
It is very hot. When the
temperature returns to normal,
the CD should play.
The road is very rough. When
the road becomes smoother, the
CD should play.
The CD is dirty, scratched, wet,
or upside down.
The air is very humid. If so, wait
about an hour and try again.
There was a problem while
burning the CD.
The label is caught in the
CD player.
If the CD is not playing correctly, for
any other reason, try a known
good CD.
If any error occurs repeatedly or
if an error cannot be corrected,
contact your dealer. If the radio
displays an error message, write it
down and provide it to your dealer
when reporting the problem.