{"nhtsa_id":601902,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-28","date":"1998-06-01","document_id":"98861208","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"COMMENTS THAT THE HVAC BLOWER FAN RUNS CONTINUOUSLY WITH IGNITION OFF. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/601902","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"S SERIES","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"T SERIES","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_chevrolet_t-series"]},{"make":"GMC","model":"S SERIES","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"T SERIES","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_gmc_t-series"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_oldsmobile_bravada"]}],"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":[]}