Chevrolet Blazer EV 2024–2025 — technical service bulletin
Bulletin PIT6231A · NHTSA communication 11011481 · issued Oct 29, 2024
Technical service bulletin
communication type
Unknown OR Other
component
2024–2025
model years
4
vehicle entries
Official summary
This Preliminary information communicates that poor phone call sound may be due to microphone being installed upside down. Technician is to reinstall the microphone to ensure it is installed correctly.
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.