Over-the-air update 661.20
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 | 11031788 |
| Published by NHTSA | 2026-04-30 |
| Manufacturer's number | 661.20 |
| Manufacturer's date | 2026-04-14 |
| Campaign id or software version | 661.20 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | CGM, EBCM: CGM-GTW (Communication Gateway Module), EBCM (Electronic Brake Control Module) |
NHTSA's summary
• This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. • Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • Improves the performance of assisted braking features.
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 EQUINOX | 2026 |
|---|---|
| GMC TERRAIN | 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.