Cadillac Optiq 2025–2026 — technical service bulletin
Bulletin 25-NA-086 · NHTSA communication 11019628 · issued Apr 25, 2025
Technical service bulletin
communication type
Electrical System
component
2025–2026
model years
2
vehicle entries
Official summary
This service bulletin provides customers and technicians on a detailed description of navigating the Dolby Atmos after installing the radio software W36E-179.1.2-M174-SQBR6-151.2.
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.