{"nhtsa_id":606369,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-08-17","date":"1999-07-01","document_id":"990620014","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY","mfr_system":null,"summary":"ON SOME MEDIUM DUTY CONVENTIONAL MODELS, THE RADIATOR SURGE TANK CAP CONTACTING UNDERSIDE OF HOOD. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/606369","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"},{"id":"radiator","name":"Radiator","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"C6500","year_from":1998,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"C7500","year_from":1998,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C6500","year_from":1998,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C7500","year_from":1998,"year_to":1999,"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":[]}