{"nhtsa_id":10052368,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2013-07-18","date":"2013-06-01","document_id":"FSB--381-048","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL","mfr_system":null,"summary":"MACK TRUCKS: A POPPING SOUND MAY BE HEARD IN THE SPEAKERS OF SOME VEHICLES BUILT WITH A SEPARATE RADIO AMPLIFIER AND LOW VOLTAGE DISCONNECT SYSTEM. *JS","document":null,"url":"https://open.wenmarpro.com/bulletins/10052368","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"instrument-cluster","name":"Instrument cluster","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CHU)","year_from":2011,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CXU)","year_from":2011,"year_to":2012,"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":[]}