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

W

1998

3

Plant Location

D

Doraville

4-9

Plant Sequence Number

--

Plant Sequence Number