Chevrolet Bolt EV 2017–2019 — technical service bulletin
Bulletin 21NA288 · NHTSA communication 10207924 · issued Dec 15, 2021
Technical service bulletin
communication type
Unknown / Other
component
2017–2019
model years
3
vehicle entries
Official summary
This service bulletin provides repair information to correct a customer concern of MIL with DTC P0AA1 - Hybrid/EV Battery Positive Contactor Circuit Stuck Closed.
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.