{"nhtsa_id":619172,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-05-17","date":"2001-02-01","document_id":"010138004","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE","mfr_system":null,"summary":"SOME DRIVES MAY COMMENT THAT THE HEATER OUTLET HOSE IS ROUTED TOO CLOSE TO THE GENERATOR OR THAT THE HOSE CONTACTS AND RUBS ON THE GENERATOR. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/619172","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":"C6500","year_from":1999,"year_to":2000,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"C7500","year_from":1999,"year_to":2000,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C6500","year_from":1999,"year_to":2000,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C7500","year_from":1999,"year_to":2000,"match":null,"vehicle_ids":[]}],"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":[]}