Circuit/System Verification

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Ignition On, observe the scan tool EBCM Stop Lamp parameter. The reading should be Released and change between Applied and Released when pressing and releasing the brake pedal, the stop lamps should turn on and off.

If not within the specified value, refer to Stop Lamps Malfunction . If the circuits test normal, replace the EBCM.