2006 GMC Yukon Owner's Manual - Page 11

Heated Seats If your vehicle has this feature, the buttons 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 seats will be canceled after the ignition is turned off. If you still want to use the heated seat feature after you restart your vehicle, you will need to press the heated seat button again. 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. 1-5