[GMC4Me]

bully dog and big tires are killing the mileage.

Yep – You don’t buy a DMAX if you are looking for Prius mileage but my stock 08 dually with a DPF gets close to 15 light and 9-11 when towing 10,000. You will be able to do a lot better than that with a 06 if you lose the tires and tuner, and keep your Revs in the sweet spot with a light foot. :gearjamin