GM Service Manual Online
For 1990-2009 cars only

The brake warning system is comprised of the following components:

    • Brake Fluid Level Switch.
    • Electronic Brake Control Module (EBCM)
    • Instrument Cluster.
    • Park Brake Switch.
    • Rear Intergration Module (RIM)

These components are used to inform the driver if any of the following conditions exist:

    • the park brake is applied.
    • the brake fluid in the master cylinder is low.
    • the electronic brake control module (EBCM) has a DTC C1XXX set as current.