Cadillac 2006 Escalade EXT Owner's Manual page 10

Heated Seats
To heat the entire seat, press the horizontal button with
the heated seat and seatback symbol. Press the button to
cycle through the temperature settings of high, medium
and low and to turn the heated seat off. Indicator lights
will be lit to designate the level of heat selected: three for
high, two for medium, and one for low.
1-4
The buttons used to
control this feature are
located on the front doors.
The engine must be
running for the heated
seats to work.
To heat only the seatback, press the vertical button with
the heated seatback symbol. An indicator light on the
seatback button will be lit to designate that only the
seatback is being heated. Additional presses of
the seatback button will cycle through the heat levels for
the seatback only. Press the horizontal button again
to heat the whole seat.
The heated front seats will be canceled after the ignition
is turned off. If you still want to use the heated front
seat feature after you restart your vehicle, you will need
to press the heated seat button again.