I bought a 2008 truck about two years ago. First one for me so I had no idea what a DPF even was. Two years later I know that both the DPF and the EGR has been deleted on the truck and I would assume that the last owner had a programmer on it at some point. Question is what programmer would be best to use in this situation. I would like better mileage out of the truck. Most of them I see listed for sale are the DPF delete and programmer together and the truck has already been deleted. What exactly is it that I will need to purchase to put a new programmer on it?