Buick Envision 2018–2021 — technical service bulletin
Bulletin 18NA162 · NHTSA communication 10180300 · issued Aug 10, 2020
Technical service bulletin
communication type
Equipment
component
2018–2021
model years
10
vehicle entries
Official summary
This technical bulletin provides a procedure for air conditioning refrigerant desiccant replacement due to A/C Not Cooling or refrigerant loss.
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.