Over-the-air update 661.40
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 | 11031823 |
| Published by NHTSA | 2026-05-01 |
| Manufacturer's number | 661.40 |
| Manufacturer's date | 2026-04-28 |
| Campaign id or software version | 661.40 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | AOS, FCM, ACP: AOS (Automatic Occupant Sensing Module), FCM (Front Camera Module), ACP2 (ADAS Compute Platform 2) |
NHTSA's summary
• Fixes to help ensure successful vehicle software updates • Fixes to help protect battery life • Improvements to provide more accurate speed limit detection on the driver’s display • Improvements to the availability of driver assistance features and fewer notifications or warnings • Fixes to help ensure driver assistance features remain functional when the windshield freezes
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.
| CHEVROLET SILVERADO EV | 2024, 2025 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| GMC SIERRA EV | 2024, 2025 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.