Cadillac CT4 2021–2022 — technical service bulletin
Bulletin 22-NA-204 · NHTSA communication 10225669 · issued Oct 24, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2022
model years
14
vehicle entries
Official summary
This technical bulletin provides possible engine noises that may require the engine to be replace if such noises have been validated to be coming from the areas indicated in the bulletin.
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.