Buick Terraza 2005–2007 — technical service bulletin
Bulletin 050854001 · NHTSA communication 10017499 · issued May 1, 2007
Technical service bulletin
communication type
Electrical System
component
2005–2007
model years
12
vehicle entries
Official summary
High effort to sound horn, horn only sounds when certain spots are pressed. *tt
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.