{"nhtsa_id":601910,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-28","date":"1998-06-01","document_id":"98831114","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"EXCESSIVE AIR FLOW COMING FROM VENTS AND/OR TOO COLD WHEN SWITCHING FORM HEATER TO BI-LEVEL ON AUTO. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/601910","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"SEVILLE","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_cadillac_seville"]}],"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":[]}