Cadillac CTS 2003–2005 — technical service bulletin
Bulletin 3051 · NHTSA communication 10010367 · issued Nov 17, 2004
Technical service bulletin
communication type
Power Train
component
2003–2005
model years
6
vehicle entries
Official summary
Howl or whine noise from the rear axle on accel and/or decel. *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.