Over-Run Alternator Decoupler (OAD) Pulley Is Making An Abnormal Noise (11-12 Models J35Z2 engine)

Over-run alternator decoupler (OAD) pulley is making an abnormal noise ('11-12 models J35Z2 engine)

Check for a broken over-run alternator decoupler (OAD) pulley Component Tests and General Diagnostics.