If you've ever seen a 1955-57 Chevy classic car and wondered what its original specifications were, there's one way to find out for certain: examine the VIN plate and the trim tag. These two pieces of metal were riveted onto the body of all Tri Five Chevy vehicles, and each provides some valuable information on the way they looked when they left the GM assembly line back in the 1950s. Read on to learn how to use our 1955-57 Chevy VIN decoder and trim tag decoder to find out more about your own '55-57 Chevy, or one you're thinking about buying and restoring.