# Service bulletin PIT6474

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: 11027881
- Published by NHTSA: 2026\-01\-30
- Manufacturer's number: PIT6474
- Manufacturer's date: 2026\-01\-22
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This PI addresses an issue where the customer may experience a loss of brake assist, accompanied by numerous MILs and warnings, after the engine has restarted following a stop/start event, caused by a drop in battery voltage tot he Brake System Control module. Dealers are to test the vehicle battery and update the Brake System control module with updated software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027881-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027881-9999.pdf)

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

## Vehicles listed

- 2022 to 2024 CHEVROLET SILVERADO 1500
- 2022 to 2024 GMC SIERRA 1500

JSON: [/v1/bulletins/11027881](/v1/bulletins/11027881)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20PIT6474&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11027881&vehicle=Service%20bulletin%20PIT6474)