Buick Envision 2021–2023 — technical service bulletin
Bulletin 22-NA-079 · NHTSA communication 10235586 · issued Apr 13, 2023
Technical service bulletin
communication type
Equipment
component
2021–2023
model years
3
vehicle entries
Official summary
This technical bulletin provides a procedure to install the cover for conditions of Poor Engine Performance in Extremely Cold Weather Conditions for LSY Engines, Charge Air Cooler Icing, Malfunction Indicator Lamp (MIL) Illuminated with a P0229.
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.