1998 Buick Riviera Owner's Manual - Page 13

Seats and Seat Controls This section tellsyou about the seats-- how to adjust them, and also about memory seats, reclining seatbacks and head restraints. The power seat controls located on the sideof the are driver's and passenger's seats. Raise or lower the frontof the seat cushion by holding the front partof the horizontal control up or down. Raise or lower the rear of the seat cushion by holding the rear part the horizontal control up or down. of Raise or lower the entire cushion by holding the seat whole control up or down. Move the seat forward or back holding the control by to the front or back. Power Seats Power Lumbar Control (Option) If you have this option, the driver's and passenger's seatback lumbar support can be adjusted by moving the single switch located on the side of the seat.increase or To decrease support, hold the switch forward or reward.