GMC Yukon 2011 Owner's Manual page 235

The CD player reads both
uncompressed audio and MP3/
WMA files on a mixed mode disc.
Uncompressd audio is played
before MP3/WMA files. Press the
CAT (category) button to toggle
between uncompressed audio and
MP3/WMA files.
CD R or CD RW Supported File
and Folder Structure
The DVD player supports:
Up to 255 folders.
Up to 8 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.
Infotainment System
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.
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.
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