This is sad to hear. I do know that your truck is very marketable, in demand. I think lots of the trouble you are having is simply because you go to a dealership. My number one rule is to stay as far away from those as I can. They do not car like a small diesel shop does that specializes in your truck. The guy that works this way with a small shop gets his word about the correct fixes from other owners that have the same problem. There are a lot of tricks to keeping these trucks and making them more reliable than any factory or dealership is capable of. Plus dealerships try pushing you into trading in for newer. Who wants that when a diesel is supposed to go at least 500k miles.