{"nhtsa_id":11031839,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-05-01","date":"2026-04-09","document_id":"661.20","mfr_campaign":"661.20","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"ACP: ACP2 (ADAS Compute Platform 2)","summary":"• Improvements to the availability of driver assistance features.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031839-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031839-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031839","components":[],"codes":[],"topics":[],"vehicles":[{"make":"BUICK","model":"ENVISION","year_from":2026,"year_to":2026,"match":"exact","vehicle_ids":["2026_buick_envision"]}],"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":[]}