if anyones got time, what all do I need to buy to install an alpine DVD/screen in an 06 Duramax? its fully loaded-bose, onstar, steering wheel controls ect. hate spending $250 dollars for bypasses but if its the only way then thats what I will do.

I know on my 05 I just ran an ignition wire to turn the deck on and every other wire was there. but I didnt have bose, onstar, and didnt care about losing my chime.