The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 25 MPH, the vehicle suddenly stalled. The vehicle was able to restart. The instrument panel was illuminated with several unknown service lights. The vehicle was taken to the dealer who diagnosed that the lifters had failed. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 140,000.