# Service bulletin PIT6339A

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: 11031716
- Published by NHTSA: 2026\-04\-29
- Manufacturer's number: PIT6339A
- Manufacturer's date: 2026\-04\-20
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This Preliminary information communicates to the field on how to diagnosis Supercruise Unavailable and Driver Attention Assist Unavailable and Drowsy Driver Feature Disabled message.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031716-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031716-9999.pdf)

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

## Vehicles listed

- 2025 CADILLAC ESCALADE
- 2025 CADILLAC ESCALADE ESV
- 2025 CADILLAC OPTIQ
- 2025 CHEVROLET SUBURBAN 1500
- 2025 CHEVROLET TAHOE
- 2025 GMC YUKON
- 2025 GMC YUKON XL

JSON: [/v1/bulletins/11031716](/v1/bulletins/11031716)

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