2005 Pontiac GTO Owner's Manual - Page 271

Vehicle Identification Vehicle Identification Number (VIN) Service Parts Identification Label You will find this label on your spare tire cover. It is very helpful if you ever need to order parts. On this label, you will find the following: This is the legal identifier for your vehicle. It appears on a plate in the front corner of the instrument panel, on the driver's side. You can see it if you look through the windshield from outside your vehicle. The VIN also appears on the Vehicle Certification and Service Parts labels and the certificates of title and registration. VIN Model designation Paint information Production options and special equipment Be sure that this label is not removed from the vehicle. Electrical System Add-On Electrical Equipment Notice: Don't add anything electrical to your vehicle unless you check with your dealer first. Some electrical equipment can damage your vehicle and the damage wouldn't be covered by your warranty. Some add-on electrical equipment can keep other components from working as they should. Your vehicle has an airbag system. Before attempting to add anything electrical to your vehicle, see Servicing Your Airbag-Equipped Vehicle on page 1-50. 5-85 Engine Identification The eighth character in your VIN is the engine code. This code will help you identify your engine, specifications and replacement parts.