Dynamic Rear Proportioning
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 dynamic rear proportioning is a control system that replaces the hydraulic proportioning function of the mechanical proportioning valve in the base brake system. The dynamic rear proportioning control system is part of the operation software in the EBCM. The dynamic rear proportioning uses active control with existing ABS in order to regulate the vehicle's rear brake pressure.
The red brake warning indicator is illuminated when the dynamic rear proportioning function is disabled.