GMC 2007 Yukon XL Owner's Manual page 310

RDM (Random): With random, you can listen to
MP3 files on the CD-R in random, rather than
sequential order. To play MP3 files from the CD-R
you are listening to in random order, press the
pushbutton positioned under the RDM label until
Random Current Disc is displayed. Press the
same pushbutton again to turn off random play.
h
(Music Navigator): Use the music navigator
feature to play MP3 files on the CD-R in order
by artist or album. Press the pushbutton located
below the music navigator label. The player
will scan the disc to sort the files by artist and
album ID3 tag information. It may take several
minutes to scan the disc depending on the number
of MP3 files recorded to the CD-R.
To cancel music navigator while the player is
scanning, press the pushbutton located below the
music navigator label or eject the disc.
The radio may begin playing while it is scanning
the disc in the background. When the scan is
finished, the CD-R will begin playing again.
Once the disc has been scanned, the player will
default to playing MP3 files in order by artist.
The current artist playing is shown on the
second line of the display between the arrows.
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If you want to listen to MP3 files by another artist,
press the pushbutton located below either
arrow button. You will go to the next or previous
artist in alphabetic order. Continue pressing
either button until the desired artist is displayed.
To change from playback by artist to playback
by album, press the pushbutton located below the
Sort By label. From the sort screen, push one
of the buttons below the album button. Press the
pushbutton below the back label to return to
the main music navigator screen. Now the album
name is displayed on the second line between
the arrows and songs from the current album will
begin to play. Once all songs from that album
are played, the player will move to the next album
in alphabetic order on the CD-R and begin
playing MP3 files from that album.
To exit music navigator mode, press the
pushbutton below the Back label to return to
normal MP3 playback.