I bought a 2005 chevy silverado crew cab about two years ago, it has 31000 miles, at 29000 miles I started having problems. start with my volt,fuel,battery,temp gauges go crazy but at the same time my xm radio quits and regular radio station comes on and says xm error, doors wont lock of unlock with gear shift, abs light,brake light comes on and chimes sound security light comes on, and tow haul dont work, and the steering wheel button for the fuel reads --- and at night i noticed that the head lights go dim them back bright...all of this happens at one time but dont do it all the time any help would be greatly appreciated... Thanks.