1993 Buick Century Owner's Manual - Page 66

I- Keys /i\ CAUTION: Leaving young children a vehicle with the in ignition keyis dangerous for many reasons. A child or others could be badly injured or even killed. They could operatepower windows or other . controls, or even make the vehicle move. Don't leave thekeys in a vehicle with young children. . The doorkeys are for 'the doors and all other locks. When a new Century is delivered, the dealer removes the plugs from the keys, and gives them to the first owner. Each plug has a codeon it that tells your dealeror a qualified locksmith how to make extra keys. Keep the plugs in a safe place. If you lose your keys, you'll be able to have new ones made easily using these plugs. 64