Cadillac CT4 2021 — technical service bulletin
Bulletin N23-240852 · NHTSA communication 10238239 · issued Jun 16, 2023
Technical service bulletin
communication type
Electrical System
component
2021
model years
2
vehicle entries
Official summary
(There may be future updates under this same release number.) Your Cadillac keeps getting better. This software update includes the following if your vehicle is equipped: Refinements: Updates made to the network connectivity to prevent unwanted interruption of emergency calls. Updates made to the Adaptive Cruise Control functionality for improved performance and smoother driving experience. Updates made to the overall vehicle software update process. Updates made to the Super Cruise driver assistance technology for enhanced lane changes, improved tunnel performance, and an overall upgraded dri
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.