Good morning, Tuned a 2016 5500 the other night with the bullydog. we didn't delete just a tune. Took three hours and had to get the latest files from bullydog via team viewer. Truck sux down low with the aisian trans but highway power is good.. no increase in fuel economy though. Truck went from the east coast to Montana for a hunting trip the next morning and that was the feedback i was given.... Also from what im told it all starts with a bullydog to unlock the ecm then you can tune with efi live. If you just looking to delete there are other options out there also...