Buick Enclave 2020–2023 — technical service bulletin
Bulletin 21-NA-023 · NHTSA communication 10217853 · issued Aug 1, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2023
model years
8
vehicle entries
Official summary
This technical bulletin provides a procedure to install dampeners on the purge line to eliminate the customers concern.
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.