GM Service Manual Online
For 1990-2009 cars only

All engines and transmissions are stamped with a partial Vehicle Identification Number (VIN). The following table identifies the different VIN derivative characters, character positions and their respective positions.

VIN Derivative Table

Position

Definition

Character

Description

1

Make

N

M

H

Chevrolet

Pontiac

Oldsmobile

2

Model Year

X

1999

3

Assembly Plant

D

Doraville

4-9

Plant Sequence Number

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Plant Sequence Number