Cadillac CTS 2003–2006 — technical service bulletin
Bulletin 3456A · NHTSA communication 10017146 · issued Oct 26, 2005
Technical service bulletin
communication type
Vehicle Speed Control
component
2003–2006
model years
11
vehicle entries
Official summary
Tcc surge, shudder or chuggle on light load just after torque converter clutch engagement with transmission at operating temperature. *sc
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.