What will i have to have or need to do to get xm in a non xm vehicle? I want to be able to use my steering wheel controls and my factory hu. ive got an aftermarket tuner in the truck right now but dont really like it. I did a search on it and it looks like some have said you just need a xm box n the wires. If so could i use what the antenna and xm box off of the aftermarket tuner?

thanks in advance