Cadillac Celestiq 2023–2025 — technical service bulletin
Bulletin PIC6583H · NHTSA communication 11030194 · issued Mar 19, 2026
Technical service bulletin
communication type
Unknown / Other
component
2023–2025
model years
8
vehicle entries
Official summary
This Preliminary information communicates how to move U018B from Current to History.
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.