The miles on this unit are all highway miles, as it was used to transport travel trailers/5th wheels all its life. It just received a new transfer case, has had the front end rebuilt 4yrs ago. This truck also had a 5 position chip, 4" exhaust, B and W goose neck hitch, extra full tank in the bed 75 gal, it gets 24 mpg empty, 17-18 pulling. new Michelin tires asking $ 15300. or best offer. $15300.00, 2313010267