Brake Warning Indicator
| Callout | Component Name |
|---|---|
| B80 | B80 Park Brake Switch |
| B20 | B20 Brake Fluid Level Switch |
| K9 | K9 Body Control Module |
| P16 | P16 Instrument Cluster |
The instrument panel cluster (IPC) illuminates the Red Brake Warning indicator when one or more of the following occurs.
- The body control module (BCM) detects that the park brake is engaged.
- The IPC detects a low brake fluid condition. The IPC receives a low brake fluid signal from the low brake fluid switch in the master cylinder reservoir requesting illumination.
- The electronic brake control module (EBCM) detects an ABS malfunction which disables dynamic rear proportioning (DRP). The IPC receives a GMLAN message from the EBCM requesting illumination.
- The IPC performs the bulb check at the start of each ignition cycle. The Red Brake Warning indicator illuminates for approximately 3 seconds before turning OFF.
- The IPC detects a loss of GMLAN communications with the EBCM.