Over-the-air update 652.20
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 | 11022216 |
| Published by NHTSA | 2025-08-29 |
| Manufacturer's number | 652.20 |
| Manufacturer's date | 2025-08-19 |
| Campaign id or software version | 652.20 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | CGM, BCM: CGM (Communication Gateway Module), BCM (Body Control Module) |
NHTSA's summary
GM Update 652.20 • Improves how center display adjusts to lighting changes. • Improved warnings when a key is missing. • Better tuning for interior lighting in Stealth mode. • Improvements to automatic low beam headlamp logic. • Smoother dimming and transitions from day to night. 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.
| BUICK ENVISION | 2025 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.