I wanna put a double din head unit in my truck (09 silverado 2500HD LTZ). it has the bose system, bluetooth, XM, OnStar and steering wheel controls. What after market harnesses do I need to make all that stuff work? I wont be using the bose subwoofer, im just going to plug my amp RCAs to the head unit. A little help with how all of this plugs in would be great.