Buick Enclave 2018 — technical service bulletin
Bulletin 18NA240 · NHTSA communication 10205049 · issued Aug 20, 2021
Technical service bulletin
communication type
Trailer Hitches
component
2018
model years
4
vehicle entries
Official summary
This technical bulletin provides a procedure to locate a possible leak at the receiver dehydrator plug and to only replace the plug if the cause for the customers concern.
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.