I recently purchase a 2011 Silverado, with the basic CD player. It has onstar, integrated phone, xm, steeringwheel controls, etc. Can I take my stereo out, and put in a factory stereo that has the full navigation.dvd screen? Will all the functions still work, and will my existing antenna work the navigation? If so, what years factory nav radios do I need to look for? 2007+, or maybe 2010+? Thanks for the help!!