I have an 2009 3500hd dully.I use this vehicle for car hailing.It is non def and had an aftermarket exhaust and some type of 1-5 switch programmer on it when i purchased it.every now and then when im running along the highway loaded.the truck will go to reduced power and display 0 percent fuel filter life.only problem is it did it with a brand new fuel filter.after u restart truck after a few minutes it is back to normal.has anyone experienced anything similar i need help!!!!