Brake Warning Indicator
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The instrument panel cluster (IPC) illuminates the brake warning 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.
- The EBCM detects a low brake fluid condition and sends a class 2 message to the IPC.
- The IPC performs the bulb check.
- An ABS-disabling malfunction also disables dynamic rear proportioning (DRP).