Over-the-air update 654.40
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 | 11026851 |
| Published by NHTSA | 2025-12-25 |
| Manufacturer's number | 654.40 |
| Manufacturer's date | 2025-12-12 |
| Campaign id or software version | 654.40 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | ICCM: ICCM (Integrated Chassis Control Module) |
NHTSA's summary
• Fixes to help protect battery health. • Improvements to traction while driving on difficult terrain and using Four-Wheel Drive Low. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
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 ESCALADE | 2025 |
|---|---|
| CADILLAC ESCALADE ESV | 2025 |
| CHEVROLET SUBURBAN 1500 | 2025 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET TAHOE | 2025 |
| GMC YUKON | 2025 |
| GMC YUKON XL | 2025 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.