{"nhtsa_id":623520,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-29","date":"2001-01-01","document_id":"010101","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN","mfr_system":null,"summary":"SUBJECT REGARDING FLEXIBLE FAN BLADES *SLC","document":null,"url":"https://open.wenmarpro.com/bulletins/623520","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-fan","name":"Cooling fan","parent":"engine"},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CHEVROLET TRUCK","year_from":1973,"year_to":1979,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"PICKUP","year_from":1973,"year_to":1979,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"VAN","year_from":1975,"year_to":1975,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"PICK UP","year_from":1973,"year_to":1979,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"VAN","year_from":1975,"year_to":1975,"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":[]}