GM Service Manual Online
For 1990-2009 cars only

Brake System Indicator

The instrument panel cluster (IPC) illuminates the brake 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. If the vehicle speed is greater than 5 mph with the park brake engaged, the driver information center (DIC) shall activate an audible warning.
    • The IPC detects a low brake fluid condition, signal circuit is low.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.