Compression Ignition Addict
Join Date: Aug 2007
Location: Buffalo, NY
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IMO, I would NOT tune your truck.
Things are different now. The big power and mileage gains are history, like the 6.4L
Tuners were a must on the 6.4L, but the 6.7L comes stock with the SCR emissions system that dramatically cuts back on what the problems with the 6.4L were, and that's EGR.
6.7L horsepower in stock form is impressive, fuel mileage is back where it belongs and your engine has a full warranty.
If you tune, there are no high horsepower increases, very small MPG gains, and your warranty is history on an engine with some real problems yet to be completely solved..
Knowing that, it's your choice if you think minimal gains are worth the risk.
KEM 345 tuned.