Brake Warning Indicator

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. 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 body control module (BCM) detects that the park brake is engaged. The IPC receives a class 2 message from the BCM requesting illumination.
The EBCM detects a low brake fluid condition and sends a class 2 message to the IPC.
The IPC performs the bulb check.
An ABS-disabling malfunction also disables dynamic rear proportioning (DRP).