Last week on our blog, we published a comprehensive guide to decoding 1955-57 Chevy VINs and trim tags, which can help you learn more about the original specifications of your classic Tri-Five Chevy. However, there's an aspect of that article that requires more detailed explanation: interior trim codes. These three-digit numbers indicate the original interior color and material combination for each vehicle. Today, we'll list each 1955, 1956, and 1957 Chevy interior trim code and the accompanying interior color, material, and model code.