{"nhtsa_id":11026843,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2025-12-25","date":"2025-12-05","document_id":"654.30","mfr_campaign":"654.30","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"TCM: TCM (Transmission Control Module)","summary":"• Fixes to help ensure proper functionality for transmission system. 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-11026843-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026843-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11026843","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2026,"year_to":2026,"match":"base","vehicle_ids":["2026_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 1500","year_from":2026,"year_to":2026,"match":"base","vehicle_ids":["2026_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":[]}