Circuit/System Description
WARNING: This page is about a different car, the 2011 GMC Cab & Chassis Sierra, 2011 Chevrolet Suburban, and 2011 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The electronic brake control module (EBCM) supplies a 12 volt reference to the yaw rate sensor/lateral accelerometer sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM microprocessor.