{"nhtsa_id":11032923,"type":"over_the_air","type_name":"Over-the-air update","date_added":"2026-05-26","date":"2026-05-11","document_id":"661.41","mfr_campaign":"661.41","replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":"ARB, ECM, IPC: ARB (Articulated Running Boards), ECM (Engine Control Module), IPC (Instrument Panel Cluster)","summary":"• Improvements to driver display information for Diesel Exhaust Fluid (DEF) range including drivable range in miles, low DEF warnings, and maximum speed warnings. • Improvements to start reliability and reduced check engine light activation. • Improvements to turbo system diagnostics. • Improvements to reliability when extending the running boards on your vehicle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032923-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032923-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11032923","components":[],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2024,"year_to":2024,"match":"base","vehicle_ids":["2024_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 1500","year_from":2024,"year_to":2024,"match":"base","vehicle_ids":["2024_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":[]}