System: interior systems; restraint; belt anchor and attachments.vehicle description: medium duty trucks equipped with studio sleepers. Note: if your vehicle IS not presented to an authorized dealer on an agreed upon service date and the remedy IS not provided within a reasonable time and free of charge or the remedy does not correct the defect or noncompliance, please contact kenworth service center at 1-206-828-5418. Also, contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.