I was driving approximately 40 mph pulling a boat on level ground I heard popping noises like the engine was stalling and saw two Puffs of either white smoke or feel missed through the rearview mirror the engine stalled and would not restart I looked underneath saw no fuel leaking towed home...
Mpg is nearly double high 20s highway but when towing back down to 13mpg I pulled 9,000 lb I also have issues with transmission overheating right at the top of my climb. I had 2008 3500 and I remember replacing that tranny every 36,000 MI so this one's at 80 no problems