GM Service Manual Online
For 1990-2009 cars only

On vehicles with heated front seats, the controls are located on the center console. To operate the heated seats the ignition must be on.

(Heated Seat): Press to turn on the heated seat.

A light indicates that the feature is working. The number of indicator lights shows the level of heat selected: one for low, two for medium, and three for high. Press the button to cycle through the temperature settings and to turn the heat off.