My stock 2006 3500 has 155,000 miles on it now and the mileage is not as good as it to be. I'm wondering if a tuner box would help it and if so which box is the better one to get, I drive it empty around town more than anything else I do put it in tow mode when I'm towing my race car in the Pace 24 Ft. trailer but that is only in the summer 10 to 15 times a year average.
Thanks for your help on this