The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that the check engine warning light was illuminated. The contact stated that upon running a diagnostic scan on the vehicle, DTC: P0301 was displayed. There were no warning lights illuminated. The vehicle was taken to a local dealer where it was diagnosed, and the contact was advised that the exhaust valve lifter was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 14,211.