{"nhtsa_id":10054507,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-01-30","date":"2013-09-01","document_id":"FSB-284-044","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"MACK: UNDER CERTAIN CONDITIONS, HIGHER THAN EXPECTED TURBOCHARGER WHEEL SPEED, UNEVEN ENGINE SPEED, LOW T2 TEMPERATURES, HIGH ENGINE LOAD, MAY HAVE REGENERATION SERVICE FAILURES. MODEL CXU, GU. NO YEARS LISTED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10054507","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"GRANITE (GU)","year_from":2012,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GU","year_from":2011,"year_to":2011,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CXU)","year_from":2011,"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":[]}