Chevrolet Blazer EV 2024–2025 — technical service bulletin
Bulletin PIT6278 · NHTSA communication 11011187 · issued Nov 8, 2024
Technical service bulletin
communication type
Unknown OR Other
component
2024–2025
model years
2
vehicle entries
Official summary
This Preliminary information communicates that a vehicle may be encountered with a whistle noise when the AC is on. The technician is advised to inspect the AC check valves and replace them if necessary.
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.