# Over\-the\-air update 661.30

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: Over\-the\-air update
- NHTSA id: 11032930
- Published by NHTSA: 2026\-05\-26
- Manufacturer's number: 661.30
- Manufacturer's date: 2026\-05\-22
- Campaign id or software version: 661.30
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: BCM, EBCM: BCM \(Body Control Module\), EBCM \(Electronic Brake Control Module\)

## NHTSA's summary

• Improvements to traction and stability control on uneven terrain • Improvements to braking performance on low\-traction surfaces • Improvements to assisted braking • Improvements to active cabin ventilation • Additional protection for the health of your battery • Updates to help prevent excessive battery drain and overheating • Improvements to the software update system

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032930-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032930-9999.pdf)

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

## Vehicles listed

- 2027 CHEVROLET BOLT EV

JSON: [/v1/bulletins/11032930](/v1/bulletins/11032930)

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