{"nhtsa_id":11030540,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-04-02","date":"2026-03-21","document_id":"661.30","mfr_campaign":"661.30","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"BCM, LRR, SRR, SBZA: BCM (Body Control Module), LRR (Long Range Radar), SRR (Short Range Radar), SBZA (Side Blind Zone Alert)","summary":"• Improvements to the performance of driver assistance features • Fixes to help ensure accurate driver display messages and alerts • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features • Fixes to help ensure proper functionality for heating and cooling features • Improvements to night mode lights for shifting gears • Fixes for Daytime Running Lamps turning on when set to Off • Fixes to help prevent erroneous missing key messages on driver display • Fixes for accuracy of low tire pressure alert • Fixes for speed threshold for pedestrian alerts","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030540-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030540-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030540","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO EV","year_from":2026,"year_to":2026,"match":"base","vehicle_ids":["2026_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA EV","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":[]}