Cadillac CT4 2022–2023 — technical service bulletin
Bulletin 23-NA-123 · NHTSA communication 10244995 · issued Oct 9, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2022–2023
model years
12
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.