I believe the truck that I just bought has been sitting on the lot for a good while. So, I have to wonder if it has had the programing flash to make it produce 400 HP and 800 ft lb of torque. My question to those of you that bought the early builds and then had the flash is this: Did it affect your fuel mileage in any way? My truck has all the power that I need right now, since I'm only hauling 8500 pounds. However, I do plan to get a bigger heavier 5th wheel camper in a year or two and I'll want all the power I can get! What do y'all think?