2011 Chevrolet Volt Owner's Manual - Page 14

1-8 In Brief Press M or L to heat the driver or passenger seat cushion and seatback. Press the button once for the highest setting. With each press of the button, the heated seat will change to the next lower setting, and then the off setting. Three lights indicate the highest setting and one light the lowest. See Heated Front Seats on page 3‑6 for more information. Auto Heated Seats Heated Seats If available, the controls are on the center stack. To operate, the vehicle must be on. If available, the controls can be accessed while the vehicle is on by pressing the CLIMATE button on the center stack.