# Service bulletin PIT6145A

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: 11023346
- Published by NHTSA: 2025\-09\-25
- Manufacturer's number: PIT6145A
- Manufacturer's date: 2025\-09\-15
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This Preliminary information communicates information to verify if the vehicle frame has been lengthened or shorted as a result of the vehicle upfit. Dealer to refer to GM Upfitter bulletin 185 if frame has been modified.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023346-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023346-9999.pdf)

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

## Vehicles listed

- 2022 CHEVROLET 5500HD
- 2020 CHEVROLET 6500HD
- 2019 to 2025 CHEVROLET SILVERADO 4500
- 2019 to 2021 CHEVROLET SILVERADO 5500
- 2023 to 2025 CHEVROLET SILVERADO 5500
- 2019 CHEVROLET SILVERADO 6500
- 2021 to 2025 CHEVROLET SILVERADO 6500

JSON: [/v1/bulletins/11023346](/v1/bulletins/11023346)

[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%20PIT6145A&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11023346&vehicle=Service%20bulletin%20PIT6145A)