2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 50

Heated Seats { WARNING: If you cannot feel temperature change or pain to the skin, the seat heater may cause burns even at low temperatures. To reduce the risk of burns, people with such a condition should use care when using the seat heater, especially for long periods of time. Do not place anything on the seat that insulates against heat, such as a blanket, cushion, cover or similar item. This may cause the seat heater to overheat. An overheated seat heater may cause a burn or may damage the seat. On vehicles with heated front seats, the controls are located on the driver and passenger doors. I (Heated Seatback): Press to turn on the heated seatback. J (Heated Seat and Seatback): Press to turn on the heated seat and seatback. The light on the button will come on to indicate that the feature is working. Press the button to cycle through the temperature settings of high, medium, and low and to 2-8 turn the heat to the seat off. Indicator lights will show the level of heat selected: three for high, two for medium, and one for low. The heated seats will be canceled 10 seconds after the ignition is turned off. To use the heated seat feature after restarting the vehicle, press the heated seat or seatback button again. Memory Seat, Mirrors, and Pedals Your vehicle may have the memory package. The controls for this feature are located on the driver's door panel, and are used to program and recall memory settings for the driver's seat, outside mirrors, and the adjustable throttle and brake pedal.