2 2 8 8 7 0 N 1 0 0 0 0 1
|-||---| | | | +-------+---> Production Sequence
 |      |     |  |  |-------------> Year/Engine Type
 |      |     |  |                   Chevrolet:
 |      |     |  |                     ???
 |      |     |  |                   Pontiac:
 |      |     |  |                     1 = 8 cylinder, all years
 |      |     |  |                     6 = 6 cylinder, all years
 |      |     |  +---------------> Assembly Plant
 |      |     |                       N = Norwood
 |      |     |                       L = Van Nuys
 |      |     +-----------------> Model Year
 |      |                           0 = 1970
 |      |                           1 = 1971
 |      +---------------------> Model Number
 |                              Chevrolet:
 |                                ???
 |                              Pontiac:
 |                                387 = Firebird
 |                                487 = Esprit
 |                                687 = Formula
 |                                887 = Trans Am
 +-------------------------> Carline Series
                                  12 = Chevrolet Camaro
                                  22 = Pontiac Firebird

2 V 8 7 X 3 N 1 0 0 0 0 1
| | |-| | | |  +---------+---> Production Sequence
|  |    |    |  | +---------------> Assembly Plant
|  |    |    |  |                       N = Norwood
|  |    |    |  |                       L = Van Nuys
|  |    |    |  +-----------------> Model Year
|  |    |    |                         2 = 1972
|  |    |    |                         3 = 1973
|  |    |    |                         4 = 1974
|  |    |    |                         5 = 1975
|  |    |    |                         6 = 1976
|  |    |    |                         7 = 1977
|  |    |    |                         8 = 1978
|  |    |    |                         9 = 1979
|  |    |    +-------------------> Engine Code
|  |    |                          Chevrolet:
|  |    |                            ???
|  |    |                          Pontiac:
|  |    |                            A = 3.8L Buick, C = 231 ci Buick, D = 250 ci,
|  |    |                            Y = 301 ci, W/Y = 4.9L, E/M/N/H/J/P/L/R/X = 350 ci,
|  |    |                            U/G/L = 5.0L Chevy, L = 5.7L Chevy, R = 5.7L Olds,
|  |    |                            X = 5.7L Buick, R/T/P/S/N/Z = 400 ci, K = 403 ci,
|  |    |                            X/Y/W = 455 ci
|  |    +----------------------> Body Type
|  |                               87 = 2 door coupe
|  +-------------------------> Carline Series
|                               Chevrolet:
|                                 ???
|                               Pontiac:
|                                 S = Firebird
|                                 T = Esprit
|                                 U = Formula
|                                 V = Trans Am (1972-1974)
|                                 W = Trans Am (1975-1979)
|                                 X = 10th Anniv Trans Am (1979)
+---------------------------> Make
                                  1 = Chevrolet
                                  2 = Pontiac

2 W 8 7 T A N 1 0 0 0 0 1
| | |-| | | | +---------+---> Production Sequence
|  |    |   |  |  +---------------> Assembly Plant
|  |    |   |  |                       N = Norwood
|  |    |   |  |                       L = Van Nuys
|  |    |   |  +-----------------> Model Year
|  |    |   |                         A = 1980
|  |    |   +-------------------> Engine Code
|  |    |                          Chevrolet:
|  |    |                            ???
|  |    |                          Pontiac:
|  |    |                            A = 3.8L Buick, S = 4.3L, A/W = 4.9L,
|  |    |                            T = 4.9L Turbo, G/H/S = 5.0L Chevy
|  |    +----------------------> Body Type
|  |                               87 = 2 door coupe
|  +-------------------------> Carline Series
|                               Chevrolet:
|                                 ???
|                               Pontiac:
|                                 S = Firebird
|                                 T = Esprit
|                                 V = Formula
|                                 W = Trans Am
|                                 X = Trans Am Indy/NASCAR Pace Cars
+---------------------------> Make
                                  1 = Chevrolet
                                  2 = Pontiac

 1 G 2 A W 8 7  T 4 B N 1 0 0 0 0 1
 | | | | | |-|  | | | | +---------+---> Production Sequence
  |  |  |  |  |   |      |  |  | +---------------> Assembly Plant
  |  |  |  |  |   |      |  |  |                       N = Norwood
  |  |  |  |  |   |      |  |  |                       L = Van Nuys
  |  |  |  |  |   |      |  |  +-----------------> Model Year
  |  |  |  |  |   |      |  |                         B = 1981
  |  |  |  |  |   |      |  +-------------------> Check Digit
 | | | | |  |   +---------------------> Engine Code
  |  |  |  |  |   |                            Chevrolet:
  |  |  |  |  |   |                              ???
  |  |  |  |  |   |                            Pontiac:
  |  |  |  |  |   |                              F/2/5 = 2.5L, I/L/2/S/7 = 2.8L, 
  |  |  |  |  |   |                              X/Z/1 = 2.8L, T = 4.9L Turbo(301cid) 
  |  |  |  |  |   |                              H/S/G/E/F = 5.0L, 7/8 = 5.7L
  |  |  |  |  |   +------------------------> Body Type
  |  |  |  |  |                                 87 = 2 door coupe
  |  |  |  |  +---------------------------> Carline Series
  |  |  |  |                                 Chevrolet:
  |  |  |  |                                   ???
  |  |  |  |                                 Pontiac:
  |  |  |  |                                   S = Firebird
  |  |  |  |                                   V = Formula
  |  |  |  |                                   T = Esprit
  |  |  |  |                                   W = Trans Am
  |  |  |  |                                   X = Trans Am Special Edition
  |  |  |  |                                   Y = Trans Am NASCAR Pace Car
  |  |  |  +-----------------------------> Restraint System
  |  |  |                                     A = Manual belts
  |  |  |                                     B = Automatic belts
  |  |  |                                     C = Automatic belts (inflatable restraint)
  |  |  +-------------------------------> Make
  |  |                                       1 = Chevrolet
  |  |                                       2 = Pontiac
  |  +---------------------------------> Manufacturer
  |                                         G = General Motors
  +-----------------------------------> Country
                                           1 = USA
                                           2 = Canada