Buick Envision 2016–2019 — technical service bulletin
Bulletin 20NA003 · NHTSA communication 10173403 · issued Feb 3, 2020
Technical service bulletin
communication type
Lane Departure
component
2016–2019
model years
4
vehicle entries
Official summary
This technical bulletin provides repair information to correct a customer concern of the Service Driver Assist Message Illuminated, Front Seat Lane Departure Warning Actuator Inoperative, DTC B172E Set.
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.