Cadillac CT4 2021–2024 — service campaign
Bulletin N242488800 · NHTSA communication 11015948 · issued Mar 26, 2025
Service campaign
communication type
Unknown OR Other
component
2021–2024
model years
5
vehicle entries
Official summary
Certain vehicles may have reduced OnStar functionality due to an improperly configured module. Dealers are to contact OnStar using the blue button in the vehicle and request a module reconfiguration from an OnStar technical advisor.
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.