{"nhtsa_id":11031788,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-04-30","date":"2026-04-14","document_id":"661.20","mfr_campaign":"661.20","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"CGM, EBCM: CGM-GTW (Communication Gateway Module), EBCM (Electronic Brake Control Module)","summary":"• This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. • Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • Improves the performance of assisted braking features.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031788-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031788-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031788","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"EQUINOX","year_from":2026,"year_to":2026,"match":"exact","vehicle_ids":["2026_chevrolet_equinox"]},{"make":"GMC","model":"TERRAIN","year_from":2026,"year_to":2026,"match":"exact","vehicle_ids":["2026_gmc_terrain"]}],"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":[]}