{"nhtsa_id":10057326,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2015-05-15","date":"2014-12-01","document_id":"1202-14","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM","mfr_system":null,"summary":"DETROIT DEMAND PERFORMANCE: INFORMATION ON SOFTWARE UPDATE SPN3216/FMI21(ACM) (GHG14). CATALYST REDUCTION. *LJ","document":null,"url":"https://open.wenmarpro.com/bulletins/10057326","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"DETROIT","model":"DETROIT","year_from":null,"year_to":null,"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":[]}