{"nhtsa_id":51246,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-06-27","date":"1997-01-01","document_id":"631109","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"AIR COMING FROM I/P VENT WHILE IN HEATER MODES OR A DELAY OCCURS WHEN CHANGING TO A NEW MODE SETTING (DIAGNOSE/MODIFY/REPLACE). *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/51246","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BUICK","model":"SKYLARK","year_from":1996,"year_to":1997,"match":"exact","vehicle_ids":["1996_buick_skylark","1997_buick_skylark"]},{"make":"OLDSMOBILE","model":"ACHIEVA","year_from":1996,"year_to":1997,"match":"exact","vehicle_ids":["1996_oldsmobile_achieva","1997_oldsmobile_achieva"]},{"make":"PONTIAC","model":"GRAND AM","year_from":1996,"year_to":1997,"match":"exact","vehicle_ids":["1996_pontiac_grand-am","1997_pontiac_grand-am"]}],"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":[]}