System: electrical system; wiring.vehicle description: class 8 heavy duty trucks equipped with detroit diesel series 60 (ddec III) engines.note: if the vehicle IS presented to an authorized dealer on an agreed upon service date and the remedy IS not provided free of charge within a reasonable time, please contact volvo gm heavy trucks at 1-910-279-2000. Also contactthe national highway traffic safety administration's auto safety hotline at1-800-424-9393.