# Service bulletin PIT6459

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: 11026069
- Published by NHTSA: 2025\-12\-03
- Manufacturer's number: PIT6459
- Manufacturer's date: 2025\-11\-26
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This PI communicates an issue where the Brake System Control Module DTC: U0028\-88 and U0037\-88 diagnostics are backwards and follow the diagnostic procedure for U0037 if U0028 is set and vice versa.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026069-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026069-9999.pdf)

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

## Trouble codes named

U0028, U0037

## Vehicles listed

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

JSON: [/v1/bulletins/11026069](/v1/bulletins/11026069)

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