Originally Posted by
Russ Dogg
The biggest problem with the 6.0 is the head studs. Usually the only time you'll lift the heads, is if you put a high hp chip on. However, if you get a programmer and get some custom tunes, you lessen the chances of that happening. A lot of the problems stem from the egr. Custom tune turn the egr off, which relieves a lot of pressure. If you don't do any performance chip or programmer, you usually won't have any problems.
The 6.4 has problems with the injectors and emissions equipment. They also don't get as much fuel mileage as the 6.0.
I could go on for awhile about this stuff. I did a lot of research before I bought mine. I really wanted an '08, but didn't get one because there seems to be too many small probs. Give me a call sometime and I'll tell you everything I found out about these trucks. Plus your more than welcome to drive mine around to get a feel for it. It's definitely a heavy truck.