What's the difference between your average car dealer and Billion Chevy Buick GMC Cadillac of Iowa City? Selection. Shop over 1,000 vehicles on campus and over 8,000 new and used vehicles online at BillionAuto.com. It's dealing with one salesperson instead of, well you know. It's a service department with 30 service bays and 2 quick lube lanes. If your car has a boo-boo, from band-aids to bumpers, our collision center does it all. Check us out today and remember... there's more than one great campus here!