6.7 turbo maybe?
Yesterday I was pulling around 10,000lbs and truck was running great. I pull up to a red light and get on it to pull away and my truck starts lugging terrible and i have 3psi boost at full throttle. I pulled over at a gas station killed the truck blew out the air cleaner started it up and it ran great for about 5 miles. This time my screen said pull over now. Boost went to zero and my truck died and wouldn't re-start. It is tuned by h&s so I returned to stock and unplugged and was about to call for a tow. I decided to give one last try and it cranked right up. Got on it and it is putting out 25psi and running strong. So, motor or chip? H&S says its the motor or turbo, but I don't know. Anyone else ever heard of this?