{"nhtsa_id":10162091,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-07-08","date":"2019-05-24","document_id":"TSB110181-052420","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of engine speed instability related to truck vacuum blower or pump engagement. Some units with transfer cases have exhibited engine speed instability when the vacuum blower or pump is engaged. New engine control module software can address most of these issues. This is an update to a previously submitted communication.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10162091-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10162091-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10162091","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"ISL9","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISX11.9","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISX12","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISX15","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"X12","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":[]}