The contact owns a 2009 Chevrolet Express. The contact stated that upon starting the vehicle, the contact became aware that the check engine warning light was illuminated. The contact took the vehicle to a local dealer, where it was diagnosed, and the contact was informed that the transmission was faulty and needed to be replaced. The transmission was replaced, and the contact continued to drive the vehicle normally. The contact stated that while driving 50 MPH, the vehicle started to vibrate abnormally. There was no warning light illuminated. The contact pulled over to the side of the road and the vehicle was towed to a local dealer to be diagnosed. The contact was informed that the transmission and the driveshaft had failed and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 30,000.