AutoNation Drives America. Over 50 Million Happy Customers have trusted us when buying or servicing their cars and trucks. That's more than any other automotive retailer. As America's Largest Automotive Retailer, we are rapidly expanding efforts to drive Customers to a seamless online to in-store experience. Thanks to AutoNation Express, Customers can shop nearly 100,000 vehicles and reserve a car or truck in 5 easy steps… saving time, hassle and money. Every vehicle comes with a low AutoNation price and every used car is backed with a 3 day/150 mile MoneyBack Guarantee.