# Over\-the\-air update N26\-254904

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: 11036479
- Published by NHTSA: 2026\-08\-31
- Manufacturer's number: N26\-254904
- Manufacturer's date: 2026\-08\-18
- Campaign id or software version: N26\-254904
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: TCP: TCP \(Telematics Connectivity Platform\)

## NHTSA's summary

• Fixes to help prevent false Service Driver Assist System messages. • Improvements to connectivity for OnStar.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036479-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036479-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Vehicles listed

- 2026 CHEVROLET SILVERADO 1500
- 2026 GMC SIERRA 1500

JSON: [/v1/bulletins/11036479](/v1/bulletins/11036479)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Over-the-air%20update%20N26-254904&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11036479&vehicle=Over-the-air%20update%20N26-254904)