When traveling over Memorial Day weekend, I had an issue with my 6.0. My friend recommended I call Johnny, and even though they were leaving for the day, he got me in the shop and took time to hook up to the computer and then checked my truck. They made me feel conformable that the truck would be O.K. I wish I had it back there so they could replace the oil cooler and EGR cooler! They know their stuff. - John B.