Chevrolet Blazer 2020–2022 — technical service bulletin
Bulletin 21-NA-038 · NHTSA communication 10209960 · issued Mar 29, 2022
Technical service bulletin
communication type
Structure
component
2020–2022
model years
3
vehicle entries
Official summary
This technical bulletin provides repair information to correct a customer concern of a humming noise heard coming from front end of vehicle when driving at highway speeds.
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.