Steering Column problems of the 2002 Cadillac Deville

The contact owns a 2002 Cadillac Deville. While driving 55 mph, the contact noticed a vibration coming from the steering column. As the speed increased, the vibration worsened and the steering wheel wobbled. He took the vehicle to the dealer four times and they identified the failure, but did not offer a solution. The manufacturer did not provide any assistance. The failure mileage was 46,000 and current mileage was 49,000.