{"nhtsa_id":10202737,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-11-03","date":"2021-10-14","document_id":"SF635","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"XMC Software Update. Due to a software issue with the Xtra Modular Controller (XMC), some body builder-installed electrical components may not work as intended (may be intermittent or non-functioning).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10202737-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10202737-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10202737","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"49X","year_from":2021,"year_to":2022,"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":[]}