{"nhtsa_id":603633,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-02-26","date":"1998-10-12","document_id":"SRV3256","mfr_campaign":null,"replaces":null,"component":"WHEELS","mfr_system":null,"summary":"SUBJECT ON HUB PILOTED DISC WHEELS. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/603633","components":[{"id":"wheels","name":"Wheels","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}