6. GMC Trucks
Ford has been the leader in the pickup market in the States for a while and to beat them, GMC and Chevy need to join forces. One of the favorite vehicles in America is definitely the ongoing GMC Sierra, whereas GMC Trucks, in general, used to be a common sight on the roads of Colorado, Mississippi, Kansas, New Mexico and Wyoming. With the average model year being 1967, we can say that there are a lot of vintage vehicles on the streets.