MPG 2017 3500s pulling 22,800

I just went from an Ecodiesel to a Cummins. The ecodiesel is extremely smooth and quiet for a diesel (since it was meant to be in a Cadillac initially). I test drove all the big 3's HD trucks before getting the Cummins. None of them seemed significantly loud, even being used to my half-ton diesel. Noise levels is a non-issue for any of the current generation HDs, they're a all nice to be in.