The contact’s mother owns a 2013 Buick LaCrosse. The contact stated that while her mother was driving approximately 55 MPH, an unknown warning light illuminated, and the steering wheel was difficult to turn in either direction. The contact stated that her mother drove the vehicle to an independent mechanic who was able to retrieve a DTC fault related to a power steering assist failure. The mechanic informed the contact’s mother that he was unable to repair the vehicle. The manufacturer was informed of the failure. The failure mileage was unknown.