Chevrolet Bolt EV 2017–2020 — technical service bulletin
Bulletin 20NA127 · NHTSA communication 10178281 · issued Jun 4, 2020
Technical service bulletin
communication type
Exterior Lighting
component
2017–2020
model years
4
vehicle entries
Official summary
This Technical bulletin provides a procedure to correct a condition of Rear Brake Lights Stay Illuminated All the Time.
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.