Chevrolet Silverado 1500 2026 — technical service bulletin
Bulletin N25-F163BU · NHTSA communication 11021069 · issued Jul 26, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2026
model years
4
vehicle entries
Official summary
GM Update N25-F163BU 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. 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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.