Cadillac CT4 2022–2023 — technical service bulletin
Bulletin 23-NA-123 · NHTSA communication 10239642 · issued Jul 14, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2022–2023
model years
6
vehicle entries
Official summary
This service bulletin provides repair information to reprogram the cooling fan to correct a customer concern of a MIL Illuminated.
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.