Cadillac Optiq 2025–2027 — technical service bulletin
Bulletin PIC6645A · NHTSA communication 11037447 · issued Sep 15, 2026
Technical service bulletin
communication type
Unknown / Other
component
2025–2027
model years
3
vehicle entries
Official summary
This Preliminary Information provides a repair direction for an inoperative amplifier module due to water intrusion.
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.