1993 Buick Century Owner's Manual - Page 22

Folding Third Seat (Option) c A .1 To Raise the Rear-Facing Third Seatback: If your vehicle, is equipped with a roll-up cargo cover, it must be removed before raising the seatback. 1. Open the liftgate and lift the storage compartment lid. 2. Fold it forward against the seatback. Press down on the seat release levers (one on each side of the seat), and allow the seatback to pop up. 20