The contact owns a 2023 Chevrolet Tah. The contact stated that while driving 15 MPH up an incline, there was an abnormal bumping sound coming from underneath the vehicle. The contact stated that the vehicle hesitated, and the transmission was slipping. There was no warning light illuminated. The vehicle was not taken to the dealer or an independent mechanic to be diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 17,000.