1999 Buick Riviera Owner's Manual - Page 11

yellowblue Heated Front Seat (Option) If your vehicle has this option, the switch is on the armrest. With the ignition in ACCESSORY or RUN, press the button once and the seat will warm up. The HI light on the button will come on. Reclining Front Seatbacks The front seatbacks can be adjusted by pressing the vertical control located on the side of the seat. Push it forward to bring the seat to a more upright position. Push it rearward to recline the seatback. Press the button a second time and the LO light will come on. The seat will warm to a lower temperature. Press the button a third time to turn off the heated seat. The heater will also turn off automatically when the ignition is turned off. 1-5