With a lead foot or without? Are you happy doing 60-65, or do you feel you need to drive at 70? Head wind or tail wind, or side wind? Hilly terrain or in mountains, or on the plains? Loaded with what you "need", or are you bringing the whole house? See...there are too many variables for that general a question.
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2016 Chevy Silverado 2500 Duramax
2016 Rockwood 8289WS, Diamond Pkg.
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