{"nhtsa_id":10055173,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-04-18","date":"2014-02-01","document_id":"PI-0837","mfr_campaign":null,"replaces":null,"component":"ENGINE; ELECTRICAL SYSTEM:SOFTWARE","mfr_system":null,"summary":"MACK TRUCKS: INFORMATION AVAILABLE REGARDING THE ENHANCEMENTS FOR ENGINE CONTROL MODULE (ECM) SOFTWARE UPDATES TO ADDRESS COLD START TIME DELAY, IMPROVED SOOT LEVEL AND PISTON COOLING JET (PCJ) DIAGNOSTIC FAULT. MODEL 2013 CHU, CXU, GU, LEU, MRU, TD. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10055173","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null},{"id":"software","name":"Software","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GRANITE (GU)","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"LEU","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"MRU","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CXU)","year_from":2013,"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":[]}