Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis 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 or above the proper level.
- If low, refer to Brake Fluid Loss .
Command the IPC display test with a scan tool, the warning indicator should turn ON.
- If the red brake warning indicator does not illuminate, replace the IPC.
Ignition ON, 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 Malfunction .
Observe the scan tool IPC Brake Fluid parameter. The reading should be OK.
- If not the specified value, refer to Brake Fluid Level Switch Malfunction .