2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 340

Using an MP3 (Radios with CD and DVD) Format The radio can play .mp3 or .wma files that were recorded onto a CD-R or CD-RW disc. The USB port can play .mp3 and .wma files that are stored on a USB storage device as well as AAC files that are stored on an iPod®. 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. 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. Compressed Audio or Mixed Mode Discs The radio plays discs that contain both uncompressed CD audio and MP3/WMA files depending on which slot the disc is loaded into. The DVD Player only reads uncompressed audio and ignores MP3/WMA files on a mixed mode disc. 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. The CD Player supports: ... 4-116