GM Service Manual Online
For 1990-2009 cars only

The purpose of the brake warning system is to warn the driver of a electronic brake deferential (EBD) failure and/or a low brake fluid condition. It also alerts the driver that the park brake is applied whilst the vehicle is being driven.

    • A brake EBD fail warning is active when the brake fail signal is active.
        A red telltale illuminates whilst the brake fail signal is active.
        A brake EBD Fail Warning is displayed both as an animation on the multi function display (MFD) and as a telltale. The general warning chime sounds when the animated warning activates. The chime will not repeat whilst the warning remains active.
        The brake EBD fail warning remains on the MFD until:
       - The ENTER switch is pressed.
       - The TRIP button is pressed.
       - The condition is rectified.
    • A brake fluid level warning is active when the instrument panel cluster (IPC) detects an increase in resistance in the brake fluid level switch circuit.
        A red telltale illuminates continuously with the ignition ON and when the resistance of the brake fluid level switch circuit is above a predetermined value.
        The brake fluid level warning is displayed both as an animation on the MFD and as a telltale. The general warning chime sounds when the animated warning activates. The chime will not repeat whilst the warning remains active.
        The brake fluid level warning remains on the MFD until:
       - The ENTER switch is pressed.
       - The TRIP button is pressed.
       - The condition is rectified.
    • The park brake warning is active when the park brake signal is active and the vehicle speed is greater than 10 km/h (6 mph).
        A red telltale illuminates whilst the park brake signal is active, regardless of the vehicle speed.
        The Park Brake Warning is displayed both as an animation on the MFD and as a telltale. The general warning chime sounds when the animated warning activates. The chime will not repeat whilst the warning remains active.
        The park brake warning remains on the MFD until:
       - The ENTER switch is pressed.
       - The TRIP button is pressed.
       - The condition is rectified.
       - The speed is reduced to less than 10 km/h (6 mph).