Heated Seat Switch
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The heated seat switch controls the high an low temperature settings through a rocker switch that is located in the center console. Battery positive voltage is supplied to the switch through the IGN 3 voltage circuit and the DIC/HVAC Fuse located in the I/P fuse block. The heated seat system will operate only with the ignition in the ON position.