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

Position

Definition

Character

Description

1

Division

4

Buick

2

Model Year

3

2003

3

Plant Location

1

Oshawa #2, ON

4-9

Plant Sequence Number

W

400001