1993 Buick Riviera Owner's Manual - Page 16

Seats and Seat Controls Power Seat Front Control (F): Raise or lower the front the seat of to by holding the switch the right or left. Center Control(C): Move the seat forward back by or holding the controlto the front or back. Raise the seat by holding the controlto the left. Hold the control the to right to lower the seat. Rear Control (R):Raise or lower the rear the seat by of holding the switch to the right or the left.