To cover all the steps between the points where the first sheetmetal is stamped and where the vehicle is ready to roll out the door would fill a very thick book. We have touched on the ones with the easiest access. For a first-hand experience, we recommend taking the public tour of the Nissan Plant in Smyrna. At peak capacity, there are 3,400 Americans working in the Symrna plant. About half of them work on the passenger car lines and the other half work on the truck/SUV lines.