Cadillac Deville 1996–1997 — technical service bulletin
Bulletin 677156 · NHTSA communication 51318 · issued Feb 1, 1997
Technical service bulletin
communication type
Vehicle Speed Control
component
1996–1997
model years
7
vehicle entries
Official summary
Buzz or moan noise during tcc apply (replace spacer plate and upper control valve). *ak
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.