The contact owns a 2024 GMC Yukon XL. The contact stated that while driving at an undisclosed speed, the engine vibrated abnormally. There was no warning light illuminated. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The local dealer was contacted and confirmed that parts were not yet available. 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 approximate failure mileage was 12,350. VIN tool confirms parts not available.