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 | 11034068 |
| Published by NHTSA | 2026-06-26 |
| Manufacturer's number | 662.20 |
| Manufacturer's date | 2026-07-07 |
| Campaign id or software version | 662.20 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | TCM: TCM (Transmission Control Module) |
NHTSA's summary
• Improves transmission diagnostic software. • Reduces unnecessary check
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 CT4 | 2025, 2026 |
|---|---|
| CADILLAC CT5 | 2025, 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.