Over-the-air update 663.10
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Over-the-air update |
|---|---|
| NHTSA id | 11037771 |
| Published by NHTSA | 2026-10-02 |
| Manufacturer's number | 663.10 |
| Manufacturer's date | 2026-08-27 |
| Campaign id or software version | 663.10 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | CGM-OTA: CGM-OTA (Communication Gateway Module - OTA Micro) |
NHTSA's 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.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
| CADILLAC XT4 | 2024, 2025 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.