GMC 2012 Sierra Series Owner's Manual page 240

7-26 Infotainment System
CD R or CD RW Supported File
and Folder Structure
The DVD player supports:
Up to 255 folders.
Up to eight folders in depth.
Up to 15 playlists.
Up to 40 sessions.
Playlists with an .m3u or .wpl
extension.
Files with an .mp3, .wma, or .cda
file extension.
The CD player supports:
Up to 512 files and folders.
Up to 8 folders in depth.
Playlists with an .m3u or .wpl
extension.
Files with an .mp3, .wma, or .cda
file extension.
Root Directory
The root directory of the disc is
treated as a folder. If the root
directory has compressed audio
files, the directory displays as
F1 ROOT on the radio.
If a disc contains both
uncompressed CD audio and MP3/
WMA files, a folder under the root
directory called CD accesses all of
the CD audio tracks on the disc.
Empty Folder
Folders that do not contain files are
skipped, and the player advances to
the next folder that contains files.
No Folder
When the disc contains only
compressed files, the files are
located under the root folder. The
next and previous folder function
does not function on a disc that was
recorded without folders or playlists.
When displaying the name of the
folder, the radio displays ROOT.
I n f o r ma t i o n P r o v i d e d b y :
When the disc contains only
playlists and compressed audio
files, but no folders, all files are
located under the root folder. The
folder down and the folder up
buttons search playlists first and
then go to the root folder. When the
radio displays the name of the
folder, the radio displays ROOT.
Order of Play
Compressed audio files are
accessed in the following order:
Playlists (Px).
Files stored in the root directory.
Files stored in folders in the root
directory.
Tracks are played in the following
order:
Play begins from the first track in
the first playlist and continues
sequentially through all tracks in
each playlist. When the last
track of the last playlist has
played, play continues from the
first track of the first playlist.