{"nhtsa_id":602748,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-01-11","date":"1998-09-01","document_id":"98876524","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:IGNITION:MODULE","mfr_system":null,"summary":"SUBJECT REGARDING ON- BOARD DIAGNOSTIC (OBD) SYSTEM IMPROVEMENTS. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/602748","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"DEVILLE","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_cadillac_deville"]},{"make":"CADILLAC","model":"ELDORADO","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_cadillac_eldorado"]},{"make":"CADILLAC","model":"SEVILLE","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_cadillac_seville"]},{"make":"OLDSMOBILE","model":"AURORA","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_oldsmobile_aurora"]}],"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":[]}