Brake Warning Indicator

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 brake warning indicator when the following occurs.

The electronic brake control module (EBCM) detects that the park brake is engaged. The IPC receives a serial data message from the EBCM requesting illumination.
The instrument panel cluster (IPC) detects a low brake fluid condition and the IPC will illumination the brake warning indicator.
The IPC performs the bulb check.
The EBCM detects an ABS-disabling malfunction which also disables electronic brake force distribution (EBD) and sends a serial data message to the IPC requesting illumination.