{"nhtsa_id":11035377,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-07-31","date":"2026-07-08","document_id":"662.20","mfr_campaign":"662.20","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"CGM, BCM, TPIM: CGM-GTW (Communication Gateway Module), BCM (Body Control Module), TPIM (Traction Power Inverter Module)","summary":"• Improvements to active cabin ventilation • Additional protection for the health of your battery • Updates to help prevent excessive battery drain and overheating • Improvements to the software update system • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Improved accuracy for driver display messages • This update contains a required software change to help improve the overall software update and diagnostics process","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035377-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11035377-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11035377","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":[]}