Chevrolet Bolt EV 2017 — technical service bulletin
Bulletin 21NA064 · NHTSA communication 10192033 · issued Mar 17, 2021
Technical service bulletin
communication type
Electrical System
component
2017
model years
1
vehicle entries
Official summary
This service bulletin provides repair information to correct a customer concern of a Service Heater Soon Message that may turn on with NO DTC Codes set and NO adverse heater performance issues.
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.