Buick Enclave 2019–2020 — technical service bulletin
Bulletin 20NA085 · NHTSA communication 10175764 · issued Apr 8, 2020
Technical service bulletin
communication type
Engine
component
2019–2020
model years
7
vehicle entries
Official summary
This technical bulletin provides a procedure to inspect the left side timing chain guide assembly for abnormal wear and to replace the guide if found the cause of the 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.