{"nhtsa_id":11023420,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2025-10-01","date":"2025-09-10","document_id":"653.20","mfr_campaign":"653.20","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"TCP: TCP (Telematics Communication Platform)","summary":"(There may be future updates under this same release number.) •Fixes to responsiveness issues with Wi-Fi, Navigation, Super Cruise, and OnStar. •Improvements to OnStar emergency calls. •Fixes to address cellular connectivity issues. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023420-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023420-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11023420","components":[],"codes":[],"topics":[],"vehicles":[{"make":"BRIGHTDROP","model":"ZEVO 400","year_from":2024,"year_to":2024,"match":"base","vehicle_ids":["2024_brightdrop_zevo"]}],"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":[]}