The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the contact became aware of an abnormal roaring sound coming from under the hood. The contact stated that the abnormal roaring sound was persistent and became louder over time. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was 12,000. VIN tool confirms parts not available.