Cadillac Lyriq 2023–2024 — technical service bulletin
Bulletin 23-NA-221 · NHTSA communication 10249458 · issued Jan 9, 2024
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
4
vehicle entries
Official summary
This service bulletin provides a procedure for Sun Load, Ambient Light, and Charge Indicator Sensor Replacement to correct a customer concern of A/C Inoperative or A/C blows warm air.
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.