Service bulletin PIT6411B
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 | Service bulletin |
|---|---|
| NHTSA id | 11023903 |
| Published by NHTSA | 2025-10-06 |
| Manufacturer's number | PIT6411B |
| Manufacturer's date | 2025-10-01 |
| NHTSA component | UNKNOWN OR OTHER |
NHTSA's summary
This information provides software update information for the K73 Telematics module to correct the symptoms described.
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.
| BRIGHTDROP ZEVO 400 | 2024 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| BUICK ENVISION | 2025, 2026 |
| CADILLAC CT5 | 2025, 2026 |
| CADILLAC LYRIQ | 2025, 2026 |
| CADILLAC OPTIQ | 2025, 2026 |
| CADILLAC XT4 | 2025 |
| CADILLAC XT4 | 2026 |
| CHEVROLET BLAZER | 2025 |
| CHEVROLET BLAZER EV | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET BRIGHTDROP 400 | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET BRIGHTDROP 600 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET COLORADO | 2025, 2026 |
| CHEVROLET EQUINOX | 2025, 2026 |
| CHEVROLET EQUINOX EV | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO EV | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET TRAVERSE | 2025, 2026 |
| GMC ACADIA | 2026 |
| GMC CANYON | 2025, 2026 |
| GMC SIERRA EV | 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC TERRAIN | 2025, 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.