The contact owns a 2019 GMC Acadia. The contact stated that while the vehicle was in park with the engine running, the vehicle suddenly rolled away. As a result of the failure, the vehicle crashed into another parked vehicle. The air bags did not deploy. No warning lights were illuminated. A police report was not filed. There were no injuries reported. The vehicle was taken to the dealer, who determined that the vehicle was operating as intended. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 42,000.