# Service bulletin PIT6450

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: 11025459
- Published by NHTSA: 2025\-11\-10
- Manufacturer's number: PIT6450
- Manufacturer's date: 2025\-11\-07
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This preliminary information communicates an issue with a Service Brake system message and DTC C0597. Dealers are to replace the brake master cylinder.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11025459-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11025459-9999.pdf)

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

## Trouble codes named

C0597

## Vehicles listed

- 2026 CADILLAC ESCALADE
- 2026 CADILLAC ESCALADE ESV
- 2026 CHEVROLET SILVERADO 1500
- 2026 CHEVROLET SUBURBAN 1500
- 2026 CHEVROLET TAHOE
- 2026 GMC SIERRA 1500
- 2026 GMC YUKON
- 2026 GMC YUKON XL

JSON: [/v1/bulletins/11025459](/v1/bulletins/11025459)

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