{"nhtsa_id":628006,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-03-01","date":"2001-10-16","document_id":"161001","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"SOME 2001 AND 2002 3500 SERIES VEHICLES MAY EXHIBIT A HVAC THAT OPERATES ERRATICALLY BY LOSS OF TEMPERATURE, MODE OR BLOWER SPEED CONTROL, OR THE BLOWER RUN AT KEY OFF. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/628006","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":"ESCALADE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_cadillac_escalade"]},{"make":"CHEVROLET","model":"3500 SERIES","year_from":null,"year_to":null,"match":"base","vehicle_ids":[]},{"make":"CHEVROLET","model":"CHEVROLET TRUCK","year_from":2000,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"3500 SERIES","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"GMC","year_from":2000,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SIERRA","year_from":2001,"year_to":2001,"match":"exact","vehicle_ids":["2001_gmc_sierra"]}],"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":[]}