2012 GMC Sierra Owner's Manual - Page 77

Seats and Restraints 3-9 Heated and Ventilated Front 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. Press the button once for the highest setting. With each press of the button, the seat will change to the next lower setting, and then to the off setting. The lights indicate three for the highest setting and one for the lowest. The passenger seat may take longer to heat up. On vehicles with heated seats, the heated seats are canceled 10 seconds after the ignition is turned off. On vehicles with heated and cooled seats, the heated and cooled seats are canceled when the ignition is turned off. To use this feature after restarting the vehicle, press the desired button again. Heated and Cooled Seat Buttons Shown, Heated Seat Buttons Similar If available, the buttons are on the front doors. To operate, the ignition must be in ON/RUN. H (Cooled Seat): If available, press to cool the seat. I (Heated Seatback): Press to heat the seatback only. J (Heated Seat and Seatback): Press to heat the seat and seatback.