{"nhtsa_id":10055515,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-06-05","date":"2014-02-01","document_id":"WS-49-13","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, DIESEL: PRE-HEATER; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY","mfr_system":null,"summary":"WESTERN STAR: AT RETURN LINE FITTING, DURING COLD EXTREME TEMPERATURES, THE DIESEL EXHAUST FLUID (DEF) TANK WOULD FREEZE. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10055515","components":[{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"fuel-tank","name":"Fuel tank","parent":"fuel-system"}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"4700","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_western-star_4700"]},{"make":"WESTERN STAR","model":"4900","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_western-star_4900"]},{"make":"WESTERN STAR","model":"6900","year_from":2014,"year_to":2014,"match":"exact","vehicle_ids":["2014_western-star_6900"]},{"make":"WESTERN STAR","model":"CONSTELLATION","year_from":2012,"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":[]}