Cadillac Lyriq 2023–2024 — technical service bulletin
Bulletin 23-NA-120 · NHTSA communication 10239640 · issued Jul 11, 2023
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
2
vehicle entries
Official summary
This service bulletin provides a procedure to correct a condition of Lower Steering Wheel Controls Inoperative, DTC B1A37.
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.