GM Service Manual Online
For 1990-2009 cars only

Vehicles with heated front seats have controls located on the driver and passenger doors, near the door handle.

(Heated Seatback): Press the button to cycle through the temperature settings and to turn the heat to the seatback off. Indicator lights next to the button show the heat level selected: three for high, two for medium, and one for low.

(Heated Seat and Seatback): Press the button to cycle through the temperature settings and to turn the heat to the seat off. Indicator lights next to the button show the heat level selected: three for high, two for medium, and one for low.

The appropriate heated seat or seatback button will need to be pressed every time the vehicle is started.