ASTRIUM GEE-1102; Plug and play on 2007/2008/2009/2010/2011/2012/2013 Chevrolet Silverado 2500HD * Updatable navigation map powered by NNG iGo and NAVTEQ; 11 Million+ POI Library; GPS Text-to-Speech Turn by Turn Instruction * Retain Factory SAT XM Radio ; Retain Door Chimes/Turn Signal; Retain OnStar; * Support Factory Bose Sound System if equipped; Support Steering Wheel Control; Bluetooth Hands-free with A2DP * DVD/CD/AM/FM/USB/SD/iPod/MP3/MP4/Bluetooth/GPS NAVI/Virtual CD Changer/AUX