Action Taken When the DTC Sets: P0A7E
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The HPCM commands the GBCM to open the high voltage contactor relays when the vehicle speed is below 5 km/h (3 mph).