GM International 2003 Cadillac DeVille, Owner'S Manual

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You may still wish to further adjust the overall firmness
or softness of the seat cushion. To get to your
desired level of comfort, hold the control up to increase
the firmness, or down for less firmness. When you
let go of the control, the seat will automatically readjust
to your desired level of comfort.
To reshape the lower seatback, press the lumbar
control forward to increase support and rearward to
decrease support. The lumbar will then automatically
adjust to your body’s positioning for the duration of the
trip in two to four-minute cycles.
If you exit the vehicle after the system has been
activated and the seat is left unoccupied for more than
two minutes, the system will deflate. You will then
need to readjust the lumbar support upon returning to
your vehicle.
To turn off the adaptive seat feature, briefly press the
bottom of the control. The seat will deflate when
the adaptive seat control or the ignition is turned off.
If your vehicle has this feature, massaging lumbar is not
available for your vehicle.
Heated Seats
Your vehicle may have heated front and rear seats.
The buttons are located on the armrests. Press the
buttons to turn the feature on. Press them again to turn
off the heated seats. The feature will also shut off
when the ignition is turned to OFF.
The HEAT/OFF button controls the temperature settings
HI, MED and LO. The other button is to choose BACK
ONLY heating. The LO setting warms the seatback and
cushion until the seat approximates body temperature.
The MED and HI settings heat the seatback and
seat cushion to a slightly higher temperature, and the
BACK ONLY heats only the seatback.
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