I have got an 07 with the 6.0 I bought it new in Feb. of 07 and have got 180000 miles on it. I tow trailers and 5th wheels out of the Elkhart IN area with it so it is worked pretty hard. Up until the last 10000 miles or so I have had no complaints with it, but now it has a miss in it. From about 1700 to 1900 RPM in overdrive and 2100 to 2300 RPM in drive. I have changed the EGR, fuel filters and even dropped the tank to see if there was something in it. The thing is throwing no codes so the dealer is of no help. Any Ideas, Im out of them.