Damon I have no 6.0 or 6.4 in my fleet as corporate got burnt on a couple of 6.0's in Calf. and Arizona so gas only. 5.4 2V in all vans have not checked as to 4 new 2009 that I am upfitting now. But what you have may be just a Diesel thing with the 6.0's have ... Login to read more.