# Service bulletin PIT5509N

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: 11035308
- Published by NHTSA: 2026\-07\-29
- Manufacturer's number: PIT5509N
- Manufacturer's date: 2026\-07\-21
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This PI provides diagnostic tips for diagnosing electric trailer brakes issues.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035308-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035308-9999.pdf)

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

## Vehicles listed

- 2021 to 2026 CADILLAC ESCALADE
- 2021 to 2026 CADILLAC ESCALADE ESV
- 2015 to 2026 CHEVROLET COLORADO
- 2014 to 2026 CHEVROLET SILVERADO 1500
- 2015 to 2026 CHEVROLET SILVERADO 2500
- 2015 to 2026 CHEVROLET SILVERADO 3500
- 2015 to 2024 CHEVROLET SUBURBAN
- 2025 to 2026 CHEVROLET SUBURBAN 1500
- 2015 to 2026 CHEVROLET TAHOE
- 2015 to 2026 GMC CANYON
- 2014 to 2026 GMC SIERRA 1500
- 2015 to 2026 GMC SIERRA 2500
- 2015 to 2026 GMC SIERRA 3500
- 2015 to 2026 GMC YUKON
- 2015 to 2026 GMC YUKON XL

JSON: [/v1/bulletins/11035308](/v1/bulletins/11035308)

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