{"nhtsa_id":10027205,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-01-10","date":"2009-06-30","document_id":"P-1662","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"MACK TRUCK: MODELS CXU, CHU, GU, MRU AND LEU CHASSIS. US07 MP7 ENGINE MANAGEMENT SYSTEM (EMS) SOFTWARE UPGRADE. THE REVISION INCLUDES A REDUCTION I N PEAK INJECTION PRESSURES TO IMPROVE LONGEVITY OF UNIT INJECTOR COMPONENTS. *PE UPDATED 9/28/09. *PE UPDATED 2/12/10. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10027205","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2006,"year_to":2008,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2006,"year_to":2008,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GU","year_from":2006,"year_to":2008,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"LEU","year_from":2007,"year_to":2008,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"MRU","year_from":2007,"year_to":2008,"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":[]}