Tire Tread/belt problems of the 2002 Chevrolet Express

While driving, the vehicle started to vibrate. The vehicle was taken to a dealer, who found the left rear tire tread was separating. When the vibration noise was heard a loud vibration followed by a sound as if the rear end had fallen off. The vehicle swayed.

Consumer states that while driving and without warning the front tires have tread separation and it will be hard for the consumer to control the vehicle. Dealer notified size#lt24575r16 please provide.