Over-the-air update 654.20
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 | 11030384 |
| Published by NHTSA | 2026-04-01 |
| Manufacturer's number | 654.20 |
| Manufacturer's date | 2026-02-09 |
| Campaign id or software version | 654.20 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | TPIM (Traction Power Inverter Module), VLM (Vehicle Leveling Module), EBCM (Electronic Brake Control Module), HDLM (High Definition Localization Module), PTM (Power Tailgate Module), BCM (Body Control Module): TPIM (Traction Power Inverter Module), VLM (Vehicle Leveling Module), EBCM (Electronic Brake Control Module), HDLM (High Definition Localization Module), PTM (Power Tailgate Module), BCM (Body Control Module) |
NHTSA's summary
• Improvements to the performance of One-Pedal Driving. • Improvements to leveling corrections. • Improvements to the performance of Super Cruise. • Improvements to the opening power of the rear power gate. • Fixes to address antilock braking system responsiveness.
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 | 2025 |
|---|---|
| GMC HUMMER EV SUV | 2025 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.