From CRG.
Chevrolet Overview
Body Bank: Receives the body shell from Fisher, assigns VIN and stamps the hidden VINs, separates them by major Chevrolet equipment and option content, and schedules them in "locked" sequence to the Chevrolet Trim Line; specs for each car are "broadcast" to subassembly and feeder lines throughout the plant.
Here is a good read if you have never seen it.
1st generation Camaro assembly process