I just got my new rig and I am looking to upgrade the factory sytem(if you can call it that) . Anyways my two biggest questions are does anyone make a decent vehicle specific sub enclosure that goes some where other than in the center console ( I got tripple benches so that is out), and is it true that if I replace the head unit I with something aftermarket the OnStar will not work properly? I am not looking to blow out my windows with a cargo area full of 15's but I really am tired of the crap that comes out of what is in there now.