Heated Seat Switch
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
The heated seat switch controls the high and low temperature settings through a rocker switch that is located near the HVAC control head. Battery positive voltage is supplied to the switch from the HVAC/CLSTR/BTSI fuse located in the IBCM fuse block. The heated seat system will operate only with the ignition in the ON position.