{"nhtsa_id":37840,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-01-11","date":"1994-11-01","document_id":"438135","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW","mfr_system":null,"summary":"BUZZING SOUND WHEN REAR DEFOGGER IS ON. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/37840","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PONTIAC","model":"SUNBIRD","year_from":1989,"year_to":1994,"match":"exact","vehicle_ids":["1989_pontiac_sunbird","1990_pontiac_sunbird","1991_pontiac_sunbird","1992_pontiac_sunbird","1993_pontiac_sunbird","1994_pontiac_sunbird"]}],"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":[]}