2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 333

Make sure the iPod has the latest firmware from Apple® for proper operation. iPod firmware can be updated using the latest iTunes® application. See www.apple.com/itunes. For help with identifying your iPod, go to www.apple.com/support. CD‐R or CD‐RW Supported File and Folder Structure The radio supports: ... Up to 50 folders. Up to 8 folders in depth. Up to 50 playlists. Up to 255 files. Playlists with an .m3u or .wpl extension. Files with an .mp3, .wma, or .cda file extension. Using an MP3 (Radios with CD) Format Radios that have the capability of playing MP3s can play .mp3 or .wma files that were recorded onto a CD-R or CD-RW disc. The files can be recorded with the following fixed bit rates: 32 kbps, 40 kbps, 56 kbps, 64 kbps, 80 kbps, 96 kbps, 112 kbps, 128 kbps, 160 kbps, 192 kbps, 224 kbps, 256 kbps, and 320 kbps or a variable bit rate. Radios that have a 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®. USB Supported File and Folder Structure The radio supports: ... Up to 700 folders. Up to 8 folders in depth. Up to 65,535 files. Folder and file names up to 64 bytes. Files with an .mp3 or .wma file extension. AAC files stored on an iPod. FAT16 FAT32 Compressed Audio or Mixed Mode Discs The radio can play discs that contain both uncompressed CD audio and MP3 files. If both formats are on the disc, the radio reads all MP3 files first, then the uncompressed CD audio files. 4-109