I’m stuck trying to think this through. I have an 09 avalanche with Bose, onstar, steering wheel controls. I want to install a nice double din touch screen along with all new speakers my own amp and sub. Could I just get a harness for a truck with all the same features without the Bose since I’ll be running rca’s to the amp from the deck or what do I need to do to make everything work when I pull the old Bose stuff out?