I was wondering if anyone knows how I can go about installing and after market radio in my Bravada. It has factory bose and onstar I don't care if the onstar still works since it's not digital and is obsolete anyway. I just want the door chimes and bose amp to still work. it just has one plug going to the radio and I've looked all over and they make adapters for a bunch of other gm vehicles to make it work but i can't find anything for mine. I was hoping someone had info on this I'm pretty new at this and it's be greatly appreciated.