The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while shifting into park(P), the vehicle failed to recognize that the vehicle was in park(P). The contact stated that the ‘Shift to Park’ message was displayed on the instrument panel. The contact was forced to move the gear shifter back and forth between gears before the correct gear was recognized. The vehicle was initially taken to a dealer; however, the dealer failed to duplicate the failure. The failure persisted and the vehicle was taken back to the dealer, and it was discovered that the transmission control module had short circuited and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not notified of the failure. The failure mileage was 41,000.