GM Service Manual Online
For 1990-2009 cars only

A red BRAKE warning lamp, located in the instrument panel cluster, is turned on when one or more of the following conditions exist:

    • When the parking brake applied. The lamp comes on when the parking brake is applied and the ignition switch is on.
    • When the fluid level is low. The lamp comes on when the fluid level in the master cylinder becomes too low.
    • When the engine is cranking. The lamp comes on to indicate that the warning circuit is operating properly.