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General Motors Protect-O-Plate Decoding Guide: 1965-1972 Chevrolet Models

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Back in 1965, General Motors realized it needed to devise a way that would allow it to track cars that were under warranty, in order to provide better service to their customers, and the GM Protect-O-Plate was born.

Looking like a metal credit card, it provides clues to most of the major equipment installed on the car. From engine to carburetor, transmission to axle, from exterior colors to options.

The General Motors Protect-O-Plate Decoding Guide: 1965-1972 Chevy Models, by PAH Publishing, covers:

  • Chevy Camaro
  • Chevy Chevelle
  • Chevy II
  • Chevy Nova
  • Corvette
  • Corvair
  • All full-size Chevy passenger cars
Today, the Protect-O-Plate, ranks as one of the best all-time documentation pieces for your car. The trouble is all this data is in code.

What does code 133311 mean?

It is simple to understand once the codes are broken down. And, with this handy little guide you will be able to decode any 1965-1972 Protect-O-Plate line by line, and you will know what all those codes mean.


  • What is the Protect-O-Plate?
  • VIN
  • Interior Codes
  • Exterior Colors
  • Steering Options
  • Generator Options
  • Radio Options
  • Windshield Wipers
  • Air Conditioning
  • Power Windows
  • Seat Equipment
  • Owners Name and Address
  • Engine Code
  • Carburetor Manufacturer
  • Axle Ratio Codes
  • Vehicle Build Month Code
  • Transmission Code
  • Brake Code
Subject: Transportation: Automotive: Restoration: Decoding Guides: GM Protect-O-Plate decoding guide covers Camaro, Chevelle, Chevy II, Nova, Corvette, Corvair, and full-size Chevy cars, 1965-1972. ISBN-10: 0971645914 | ISBN-13: 9780971645912 | PAH Publishing GMDG

  • Publisher: PAH Publishing
  • Author: Paul Herd
  • Pages: 66
  • Binding: Paperback/Spiralbound - 5.5 x 8.5 inches
  • ISBN: 978-0-9716459-1-2
  • Years: 1965 - 1972
  • General Motors Protect-O-Plate Decoding Guide 1965-1972 Chevrolet Models