Action Taken When the DTC Sets
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The radio sets the DTC and continues to output the correct muted or unmuted amplifier state based on the fault condition on the circuit.