Cadillac Lyriq 2022–2024 — technical service bulletin
Bulletin PIT5878D · NHTSA communication 10236149 · issued Apr 14, 2023
Technical service bulletin
communication type
Visibility
component
2022–2024
model years
4
vehicle entries
Official summary
This Preliminary information communicates to the field engineering contacts to assist in the diagnosis of HVAC concerns on the new 2022-2024 HUMMER EV and the 2023 LYRIQ.
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.