Circuit/System Verification

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Verify the park brake is released and the brake fluid is at the proper level.
- If the brake fluid is not at the proper level, refer to Brake Fluid Loss .
Ignition ON, perform the scan tool IPC Display Test. The red brake warning indicator should illuminate.
- If the red brake warning indicator does not illuminate, replace the IPC.
Observe the scan tool BCM Park Brake Switch parameter while applying and releasing the park brake. The parameter should cycle between Applied and Release.
- If the parameter does not cycle between the specified values, refer to Park Brake Switch Circuit Malfunction .
Verify the scan tool IPC Brake Fluid parameter is OK.
- If not the specified value, refer to Brake Fluid Level Switch Circuit Malfunction .