{"nhtsa_id":11031827,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-05-01","date":"2026-04-28","document_id":"661.21","mfr_campaign":"661.21","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"TCP: TCP (Telematics Communication Platform)","summary":"• Improvements to the performance of vehicle software updates. • Fixes to help prevent loss of functionality for connectivity features, including maps and Wi-Fi. • Fixes to help prevent erroneous emergency calls from vehicle. • Fixes for deleting digital keys. • Fixes to help ensure proper functionality for mobile app features. • Improvements to the performance of Super Cruise.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031827-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031827-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031827","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_cadillac_escalade"]},{"make":"CADILLAC","model":"ESCALADE ESV","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_cadillac_escalade-esv"]},{"make":"CHEVROLET","model":"SUBURBAN 1500","year_from":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_chevrolet_suburban"]},{"make":"CHEVROLET","model":"TAHOE","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_chevrolet_tahoe"]},{"make":"GMC","model":"YUKON","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_gmc_yukon"]},{"make":"GMC","model":"YUKON XL","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_gmc_yukon-xl"]}],"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":[]}