Chevrolet Bolt EV 2017–2021 — technical service bulletin
Bulletin 19NA220 · NHTSA communication 10191195 · issued Mar 8, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2021
model years
5
vehicle entries
Official summary
This service bulletin provides a procedure to inspect and possibly replace the engine wiring harness if found damaged near the X2 connector to correct a customer concern of Loss of Propulsion, MIL Illuminated w/DTCs.
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.