GM Service Manual Online
For 1990-2009 cars only

Important: 

   • The illumination of the BRAKE indicator may indicate reduced braking ability.
   • If the BRAKE indicator lights when the brake fluid level is normal and the parking brake circuit is functioning properly, then a malfunction with the braking system exists. Refer to Brake Warning Indicator Always On .
   • On vehicles equipped with Antilock Brake System (ABS), the BRAKE indicator will also alert the driver if an ABS system malfunction has affected the base brake system operation. For diagnosis of the ABS, refer to ABS Description in Antilock Brake System.

The BRAKE indicator is located in the instrument cluster. The BRAKE indicator illuminates in order to warn the driver of conditions in the brake system (base braking) which may result in reduced braking capability.

The BRAKE indicator illuminates when the parking brake is applied or not fully released

The following conditions will turn on the BRAKE indicator:

    • The parking brake is not fully released. If the parking brake is applied or the lever is not fully released, the switch on the parking brake lever assembly will ground the BRAKE indicator circuit and cause it to illuminate.
    • The brake fluid level is low. If the brake fluid level drops in the master cylinder reservoir, the fluid level sensor will ground the BRAKE indicator circuit, causing the BRAKE indicator to illuminate.
    • During engine cranking the BRAKE indicator remains on. This condition notifies the driver that the warning circuit is operating properly.