Circuit System Verification
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, press the driver heated seat cushion/back heat mode switch. The heated seat switch temperature indicators should illuminate and the seat should operate in the high heat mode. Press the heated seat back only mode switch. The heated seat switch temperature indicators should illuminate and the seat should operate in the back only heat mode. Press the heated seat cool mode switch. The heated seat switch temperature indicators should illuminate and the seat should operate in the cool mode.