Buick Envision 2021–2025 — technical service bulletin
Bulletin 25-NA-023 · NHTSA communication 11014293 · issued Feb 7, 2025
Technical service bulletin
communication type
Electrical System
component
2021–2025
model years
5
vehicle entries
Official summary
"This technical bulletin provides a procedure to replace the B357 Inside Ambient Air Quality Particulate Sensor Module to correct a customer concern of hearing a buzzing and/or whirring type noise coming from the dash behind the HVAC control."
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.