Chevrolet Volt 2016–2019 — technical service bulletin
Bulletin 21NA259 · NHTSA communication 10205579 · issued Nov 9, 2021
Technical service bulletin
communication type
Electrical System
component
2016–2019
model years
4
vehicle entries
Official summary
This service bulletin provides diagnostic information to correct customer concerns of Speed Limited Message or Reduced Propulsion Power Message Displayed on Driver Information Center (DIC) with no DTCs Set.
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.