So I got a Diablo Predator tuner for my lb7 and its got the 60 hp tune i think it is loaded right now go to plug the tuner in to switch to a tow tune and it wont turn on its dead.. Can I get a different tuner and start using it again or what do i need to do since my truck is not on a stock tune? Also what would be a good tuner to get for the truck just looking to increase mileage.
