Circuit Description
WARNING: This page is about a different car, the 2010 GMC Canyon and 2010 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
The instrument panel cluster (IPC) illuminates the stability control indicator during the bulb check. The BCM supplies voltage to the traction control switch, when pressed the instrument panel cluster receives a serial data message form BCM to illuminate the traction control indicator.