The contact owns a 2023 GMC Sierra 1500. The contact stated that while driving on two occasions at 60 MPH, the vehicle stalled. The vehicle was restarted after the first failure but was unable to restart after the second failure. The vehicle was taken to a dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 27,750.