2006 Buick Lucerne Owner's Manual - Page 79
2006 Buick Lucerne Manual
Page 79 highlights
Keys {CAUTION: Leaving children in a vehicle with the ignition key is dangerous for many reasons. They could operate the power windows or other controls or even make the vehicle move. The children or others could be badly injured or even killed. Do not leave the keys in a vehicle with children. 2-3