Cadillac CT4 2021–2023 — service campaign
Bulletin N242450630 · NHTSA communication 11013227 · issued Jan 29, 2025
Service campaign
communication type
Unknown OR Other
component
2021–2023
model years
5
vehicle entries
Official summary
Service Update. Certain vehicles equipped with a 2.7L engine (RPO L3B), may have an Engine Control Module (ECM) that does not sufficiently control fuel injector flow rate under certain driving conditions. Dealers are to reprogram the ECM.
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.