{"nhtsa_id":11030533,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-04-02","date":"2026-03-28","document_id":"661.10","mfr_campaign":"661.10","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"TCP: TCP (Telematics Connectivity Platform)","summary":"• Fixes to help prevent false Service Driver Assist System messages. • Improvements to connectivity for OnStar.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030533-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030533-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030533","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2022,"year_to":2025,"match":"base","vehicle_ids":["2022_chevrolet_silverado","2023_chevrolet_silverado","2024_chevrolet_silverado","2025_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 1500","year_from":2022,"year_to":2025,"match":"base","vehicle_ids":["2022_gmc_sierra","2023_gmc_sierra","2024_gmc_sierra","2025_gmc_sierra"]}],"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":[]}