The contact owns a 2023 GMC Yukon XL. 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 contact stated that while driving at various speeds and attempting to accelerate, the vehicle was jerking and hesitating while accelerating. There were no warning lights illuminated. The dealer was contacted. The manufacturer was not made aware of the issue. The failure mileage was approximately 19,000. VIN tool confirms parts not available.