GM Service Manual Online
For 1990-2009 cars only

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

VIN Derivative

Position

Definition

Character

Description

1

Division

2

Pontiac

2

Model Year

4

2004

3

Plant Location

1

Oshawa #2, ON

4-9

Plant Sequence Number

W

200001