Cadillac CT4 2020 — technical service bulletin
Bulletin PIC6390B · NHTSA communication 10216354 · issued Jun 6, 2022
Technical service bulletin
communication type
Unknown OR Other
component
2020
model years
3
vehicle entries
Official summary
This Preliminary information communicates a parts restriction is in place for the Central Gateway Module on 2020 Cadillac CT4, CT5, and Chevrolet Corvette.
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.