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 | 11031767 |
| Published by NHTSA | 2026-04-30 |
| Manufacturer's number | 661.40 |
| Manufacturer's date | 2026-04-01 |
| Campaign id or software version | 661.40 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | ACP3: "ACP3_MCU (ADAS Compute Platform 3 - Microprocessor Control Unit), ACP3_SOC (ADAS Compute Platform 3 - System On A Chip) |
NHTSA's summary
• Improvements to the performance of Brake Assist. • Fixes to help ensure proper Super Cruise lane change functionality.
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.
| GMC HUMMER EV PICKUP | 2026 |
|---|---|
| GMC HUMMER EV SUV | 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.