# Service bulletin PIC6637B

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: 11033998
- Published by NHTSA: 2026\-06\-18
- Manufacturer's number: PIC6637B
- Manufacturer's date: 2026\-06\-10
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This document is a technical bulletin regarding CarPlay issues in certain Buick and Chevrolet models. It details the problem, cause, and current status of the software anomaly affecting CarPlay connectivity.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033998-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033998-9999.pdf)

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

## Vehicles listed

- 2024 to 2026 BUICK ENCORE GX
- 2024 to 2026 BUICK ENVISTA
- 2024 to 2026 CHEVROLET TRAILBLAZER
- 2024 to 2026 CHEVROLET TRAX

JSON: [/v1/bulletins/11033998](/v1/bulletins/11033998)

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