2010 Cadillac STS Owner's Manual - Page 472

Vehicle Identification Vehicle Identification Number (VIN) Service Parts Identification Label This label, on the spare tire cover, has the following information: ... Vehicle Identification Number (VIN) Model designation Paint information Production options and special equipment Do not remove this label from the vehicle. This legal identifier is in the front corner of the instrument panel, on the driver side. It can be seen through the windshield from outside. The VIN also appears on the Vehicle Certification and Service Parts labels and certificates of title and registration. Electrical System Add-On Electrical Equipment Notice: Do not add anything electrical to the vehicle unless you check with your dealer/retailer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle's warranty. Some add-on electrical equipment can keep other components from working as they should. Add-on equipment can drain the vehicle battery, even if the vehicle is not operating. Engine Identification The eighth character in the VIN is the engine code. This code identifies the vehicle's engine, specifications, and replacement parts. See "Engine Specifications" under Capacities and Specifications on page 6‑130 for the vehicle's engine code. 6-116