{"nhtsa_id":10057786,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2015-06-27","date":"2015-04-24","document_id":"TIB-01-063","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT","mfr_system":null,"summary":"KENWORTH: SOME TRUCKS SLEEPER HEATERS ARE EXPERIENCING A LEAKAGE FROM SLEEPER HEATER CORE O RING COOLANT. MODEL 2012-13 T680, T880. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10057786","components":[{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"T680","year_from":2012,"year_to":2013,"match":"exact","vehicle_ids":["2012_kenworth_t680","2013_kenworth_t680"]},{"make":"KENWORTH","model":"T800","year_from":2012,"year_to":2013,"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":[]}