Tl* the contact owns a 2016 buick cascada. while driving approximately 1 mph, the vehicle drove over a curb. when the vehicle was taken to axelrod gmc buick (parma, oh, 216-661-5060) for an oil change, the technician diagnosed that there was a crack in the frame. the manufacturer was made aware of the failure and sent an investigator to assess the damage. the investigator was unable to determine the cause of the failure. the contact was offered a rental vehicle while the dealer kept the vehicle for investigation. when the contact retrieved the vehicle, she noticed that all parts of the vehicle, including the steering wheel and seats, vibrated. the dealer was unable to explain the cause of the failures and did not test drive the vehicle. the manufacturer was made aware of the failures and stated that the vehicle was performing as expected. the failure recurred and was not repaired. the failure mileage was approximately 6,000.