 I bought the truck used back in '05.  The previous owner must have had the engine injectors and turbo changed (a common problem with the first 6.0l diesels), because this thing has been a powerhouse for me, never a problem. Now that its getting older, and has 100,000 miles, I am still pulling horse trailers, and loving the power.  My only qualm is a weird rattle from the frame SOMEWHERE (can't seem to find it when not moving). I couldn't be happier with the truck, and will probably hold onto it for another 3 years, then give it to my daughter as her first vehicle (she can pull her own horse trailer then!).