Cadillac CT4 2019–2021 — technical service bulletin
Bulletin PIP5804 · NHTSA communication 10197282 · issued May 5, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2021
model years
13
vehicle entries
Official summary
This Preliminary information communicates the possibility of a inaccurate #1 Coolant Temperature Sensor causing the engine to run hot or overheat with possible over temperature message displayed on DIC
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.