2004 Chevrolet Impala Owner's Manual - Page 357

Vehicle Identification Vehicle Identification Number (VIN) Service Parts Identification Label You'll find this label on the inside of your trunk lid. It's very helpful if you ever need to order parts. On this label is: 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. your VIN, the model designation, paint information and a list of all 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 air bag system. Before attempting to add anything electrical to your vehicle, see Servicing Your Air Bag-Equipped Vehicle on page 1-61. 5-95 Engine Identification The 8th character in your VIN is the engine code. This code will help you identify your engine, specifications and replacement parts.