The contact owns a 2026 Chevrolet Trailblazer. The contact stated that while driving at various speeds, the vehicle failed to properly shift into gear while the gear shift lever was in use. The check engine and another unknown warning light were illuminated. The vehicle was towed to a local dealer, where several undisclosed fault codes were cleared. The vehicle was towed back to the same local dealer, where it remained for further investigation. The contact was informed that the transmission might need to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 100.