{"nhtsa_id":10189331,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-24","date":"2021-03-03","document_id":"SB54-338","mfr_campaign":null,"replaces":null,"component":"VISIBILITY; EQUIPMENT","mfr_system":null,"summary":"Revised Freightliner Service Bulletin for Updating HVAC ECU Software to Fix Front HVAC Evaporator Freezing and Improve Espar Heater Cool Down. This bulletin replaces the version dated 12/23/2020. Information has been added about ParkSmart units and the instructions have been streamlined.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10189331-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10189331-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10189331","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"visibility","name":"Glass, wipers and mirrors","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"CASCADIA","year_from":2017,"year_to":2022,"match":"exact","vehicle_ids":["2017_freightliner_cascadia","2018_freightliner_cascadia","2019_freightliner_cascadia","2020_freightliner_cascadia","2021_freightliner_cascadia","2022_freightliner_cascadia"]}],"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":[]}