5500HD 4X4 6.7L Cummins Regular Cab Mason Dump. 5 Day Money Back Guarantee: This is our favorite benefit! For any reason at all, feel free to return your truck within 5 days from the purchase and we will give you a full refund. It's simple... If the truck doesn't work for you, return it! All we ask is that you bring it back in the same condition it...