# Service bulletin PIT6522

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: 11033987
- Published by NHTSA: 2026\-06\-18
- Manufacturer's number: PIT6522
- Manufacturer's date: 2026\-06\-10
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This PI advises dealers that if the K160 Brake System Control Module sets DTC P0606 along with P0562 and/or P25A2, additional diagnostic aids should be followed before replacing parts. The PI provides guidance to inspect for low voltage conditions, wiring, terminal concerns, and module communication issues that may cause false or intermittent EBCM DTCs.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033987-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033987-9999.pdf)

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

## Trouble codes named

P0562, P0606, P25A2

## Vehicles listed

- 2021 to 2026 CADILLAC ESCALADE
- 2021 to 2026 CADILLAC ESCALADE ESV
- 2023 to 2026 CHEVROLET COLORADO
- 2022 to 2026 CHEVROLET SILVERADO 1500
- 2022 to 2026 CHEVROLET SILVERADO 2500
- 2022 to 2026 CHEVROLET SILVERADO 3500
- 2024 CHEVROLET SUBURBAN
- 2021 to 2025 CHEVROLET TAHOE
- 2024 to 2025 GMC ACADIA
- 2023 to 2026 GMC CANYON
- 2022 to 2026 GMC SIERRA 1500
- 2022 to 2026 GMC SIERRA 2500
- 2022 to 2026 GMC SIERRA 3500
- 2021 to 2026 GMC YUKON
- 2021 to 2025 GMC YUKON XL

JSON: [/v1/bulletins/11033987](/v1/bulletins/11033987)

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