Circuit/System Description
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The driver and front passenger heated seats are controlled by separate seat heating switches. When a seat heating switch is pressed, ground is momentarily applied through the switch contacts and the switch signal circuit to the door switch panel control module. In response to this signal, the door switch panel control module sends serial data a message to the seat memory control module indicating the heat seat request. The door switch panel control module then applies voltage through the appropriate indicator control circuits to the seat heating and cooling switch illuminating the indicators.