Buick Century 1996–1998 — technical service bulletin
Bulletin 97121797022 · NHTSA communication 54475 · issued Dec 17, 1997
Technical service bulletin
communication type
Visibility
component
1996–1998
model years
5
vehicle entries
Official summary
Subject on hvac manual climate control mode selector first phase owner notification letter mailing. *yc
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.