Over-the-air update 654.21
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 | 11027918 |
| Published by NHTSA | 2026-02-01 |
| Manufacturer's number | 654.21 |
| Manufacturer's date | 2026-01-16 |
| Campaign id or software version | 654.21 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | VICM: VICM (Vehicle Integration Control Module) |
NHTSA's summary
• Improvements to help protect battery health in low temperatures. • Improvements to diagnostics to reduce service messages. • Fixes to help protect battery health in high temperatures. • Fixes to improve responsiveness for vehicle diagnostics.
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.
| CADILLAC VISTIQ | 2026 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.