Over-the-air update 662.20
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 | 11034939 |
| Published by NHTSA | 2026-07-08 |
| Manufacturer's number | 662.20 |
| Manufacturer's date | 2026-06-22 |
| Campaign id or software version | 662.20 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | BCM, PTM, HDLM, SRR, EBCM: BCM (Body Control Module), PTM (Power Tailgate Module), HDLM (High Definition Localization Module), SRR (Short Range Radar), EBCM (Electronic Brake Control Module) |
NHTSA's summary
• The active cabin ventilation feature will operate more reliably • Additional protection for the health of your battery and updates to help prevent excessive battery drain and overheating • Improvements will support successful software updates for your vehicle and allow you to access new features and fixes
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 | 2024 |
|---|---|
| GMC HUMMER EV SUV | 2024 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.