The contact owns a 2024 Chevrolet Silverado 1500. 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 dealer was contacted and informed the contact that parts for the recall repair were not yet available. The contact stated that there was a thumping sound coming from the engine compartment. The contact stated that the vehicle was vibrating, hesitating, and shuddering while idling or driving at slower speeds of approximately 10 – 40 MPH. There were no warning lights illuminated. The dealer diagnosed the vehicle but had not retrieved any fault codes. The manufacturer was made aware of the issue. The approximate failure mileage was 23,000. VIN tool confirms parts not available.