I have an 05 1ton dually with mbrp 4 inch exhaust and an afe intake. needless to say towing my car trailer weighing in a little under 16000 lbs. my truck is a terd. I had an 05 single rear wheel LLY with edge attitude and my experience is the edge runs hot as hell. With so many different chips and programmers out there I do not know whats best for me. I live in Reno nevada and every where I go there are serious grades coming and going to the races. Any help would be much appreciated.