GMC Sierra Owners Manual
Heated and Ventilated Seats
If available, the buttons are on the front doors.
: If available, press to cool the seat.
: Press to heat the seatback only.
: Press to heat the seat and seatback.
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.
See Heated and Ventilated Front Seats on page 3‑9.