NHTSA Complaint #11457400 — 2014 CHEVROLET IMPALA

At about 86,000 miles I began getting a grinding noise from the left front side the wheel seems to lock up associated with a grabbing that I can feel when turning the steering wheel to the left. When this happens the Service Stability Trac and Service Trac Control indicators sometime appear but not always. I took my car to a GM Dealer locally a diagnostic performed said it was wheel hub assembly (bearings). Due to cost of dealer labor I took car to my local mechanic at his private garage. He performed a diagnostic and confirmed the assembly should be replaced. The assembly was replaced at my cost and has since been replaced twice more as warranty replacement because the mechanic thought the assemblies may have been defective, this after only a couple thousand miles or so on the replaced assembly. Typically, it happens at low speed, and mostly when turning left. It becomes a problem when I'm driving in busy traffic and turning at an intersection because it will just lock up and not let me go, stopping me in the middle of the intersection subjecting me to the possibility of being crashed into by other drivers. It is very frightening when this happens.