I have a 2009 chevy 1500 XFE edition. It has 4203 miles on it. 2 days ago while sitting at a light the truck died ignition only all gauges are still reading good all lights. Except it will not start. Called through onstar for a tow and after 2 hours they showed up. Took to dealership where I bought it from and they said battery problem told them full of crap went out there with tech with new battery and still nothing. They could not get it to start did diags all day found nothing wrong just would not start not even engage. Before the techs went home one of them went over there and tried it and it started. Now according to them it is fine. They don't know what caused it and now they cant fix it because they still don't know what was wrong with it. Any ideas and what should i do? I don't want it back without an explanation, but they did not have one when the problem was there and now it according to them doesn't have one now. I have made my first payment only and about to make my second one, that is how new it is. Anyone here help?