Chevrolet Silverado 1500 2021–2022 — technical service bulletin
Bulletin N25-250552 · NHTSA communication 11032925 · issued May 12, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2021–2022
model years
8
vehicle entries
Official summary
• Improvements to OnStar functionality.
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.