1. It's hard to wrap your mind around the idea of 400 GMC and Chevy trucks a shift (with three shifts running a day) being manufactured, but at the Fort Wayne, Indiana, Assembly Plant, that's a slow day. Every 2014 Sierra standard and Double Cab is manufactured by the 3,400 trained line workers, and after spending a day with several of them, it's hard not to take pride in these American trucks. Featuring stronger steel, the fully boxed frames come in via railcar and get loaded into the Fort Wayne Assembly Plant by forklifts. Each frame gets a VIN stamp and this frame-specific number is entered into the plant's computers to ensure each part goes onto the proper truck.