1997 Cadillac DeVille Owner's Manual - Page 20

Heated Front Seat (Option) Reclining Front Seatbacks The control is located onthe outboard side of each front seat. Move the SEAT HEAT control to either or HI LO to turn on the heating elements in the seat. The LO setting warms the seatback and cushion until the seat approximates body temperature.The HI setting heats the seat to a slightly higher temperature.telltale lightin A the control reminds you that the heating system is in use. The heated seatscan only be used when the ignition is turned on. Press the recliner control forward or rearward adjust to the seatback. 1-5