Chevrolet Bolt EV 2019–2020 — technical service bulletin
Bulletin 20NA170 · NHTSA communication 10181700 · issued Sep 2, 2020
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2019–2020
model years
2
vehicle entries
Official summary
This Technical bulletin provides a procedure to correct a customer concern of a Clicking Type Noise Heard Near Brake Pedal and/or I-Booster Under the Hood.
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.