2008 hummer h2 Bluestar Install

[twr]

Hi your nav radio does not play dvd's on screen and the GMX322 will not change it so you can watch on screen. Its unlocks 2008/09 hummer and 2007/09 gmc trucks nav units that play dvd's on screen, to play when out of park or while driving and to plug in a addresses while driving. Its also lets you turn camera's on any time if if have them. Hope this helps.