{"nhtsa_id":45655,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-11-01","date":"1995-06-01","document_id":"MOD95M6","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"DETROIT DIESEL CORPORATION (DDC) HAS DETERMINED THAT CERTAIN 6V-92 DDEC FIRE TRUCK ENGINES WILL REQUIRE THE REPLACEMENT OF THE BLOWER BYPASS VALVE COUPLED WITH AN ECM REPROGRAM. DETROIT DIESEL DEALERS ARE TO SERVICE ALL ENGINES SUBJECT TO THIS MODIFICATION. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/45655","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"DETROIT","model":"DETROIT","year_from":1993,"year_to":1995,"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":[]}