2010 Buick Lucerne Owner's Manual - Page 40

Reclining Seatbacks Manual Reclining Seatbacks { WARNING: If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatbacks to be sure they are locked. If the seats have manual reclining seatbacks, the lever used to operate them is located on the outboard side of the seats. { WARNING: You can lose control of the vehicle if you try to adjust a manual driver's seat while the vehicle is moving. The sudden movement could startle and confuse you, or make you push a pedal when you do not want to. Adjust the driver's seat only when the vehicle is not moving. 2-8