Plymouth GTX Vehicle Identification Number Decoding

The first digit "R" identifies the Belvedere/Satellite car line. 

The second digit "S" identifies the series.

• In 1967 "S" indicates Satellite GTX

• In 1968 - 1971 "S" indicates GTX

The third and fourth digits identify the bodystyle.

• 23 = 2 Door Hardtop

• 27 = 2 Door Convertible

The fifth digit identifies the engine.

• J = 426 2x4bbl HEMI V8 (67-69)

• L = 440 4bbl V8 (67-69)

• R = 426 2x4bbl HEMI V8 (70-71)

• U = 440 4bbl V8 (70-71)

• V = 440 3x2bbl V8 (70-71)

The sixth digit identifies the model year.

• 7 = 1967

• 8 = 1968

• 9 = 1969

• 0 = 1970

• 1 = 1971
  

The seventh digit identifies the assembly plant.

1967 Assembly plant codes

• 1 = Lynch Road, Detroit, Michigan

• 5 = Los Angeles, California

• 7 = St. Louis, Missouri

1968-1971 Assembly plant codes

• A = Lynch Road, Detroit, Michigan

• E = Los Angeles, California

• G = St. Louis, Missouri

• R = Windsor, Ontario, Canada

The eighth through thirteenth digits identify the sequential production number (serial number) for the assembly plant starting with 100001. 

Using the sample VIN of RS23L9A123456 as an example:

This vehicle is a 1969 Plymouth GTX
2-door Hardtop,
440-4v High Performance V8 engine
and was the 23,456th car scheduled for production at the
Lynch Road, Detroit, Michigan assembly plant.