Cadillac XT4 2024–2025 — technical service bulletin
Bulletin 663.10 · NHTSA communication 11037771 · issued Aug 27, 2026
Technical service bulletin
communication type
Unknown / Other
component
2024–2025
model years
2
vehicle entries
Official summary
This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior.
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.