2004 Buick Century Owner's Manual - Page 69

The ignition key is for the ignition only. The keys have unique codes embedded in them to help prevent theft. See PASS-Key® II on page 2-17 for more information. Your dealer or Buick Roadside Assistance can provide the correct codes for the keys. Contact your dealer or see Roadside Assistance Program on page 7-5 for more information. Notice: If you ever lock your keys in your vehicle, you may have to damage the vehicle to get in. Be sure you have spare keys. The door key is for the driver door and all other locks. If the vehicle has the OnStar® system with an active subscription, and the keys were locked inside, a command could be sent by the OnStar® system to unlock the vehicle. See OnStar® System on page 2-33 for more information. 2-3