# 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: 11030540
- Published by NHTSA: 2026\-04\-02
- Manufacturer's number: 661.30
- Manufacturer's date: 2026\-03\-21
- Campaign id or software version: 661.30
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: BCM, LRR, SRR, SBZA: BCM \(Body Control Module\), LRR \(Long Range Radar\), SRR \(Short Range Radar\), SBZA \(Side Blind Zone Alert\)

## NHTSA's summary

• Improvements to the performance of driver assistance features • Fixes to help ensure accurate driver display messages and alerts • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features • Fixes to help ensure proper functionality for heating and cooling features • Improvements to night mode lights for shifting gears • Fixes for Daytime Running Lamps turning on when set to Off • Fixes to help prevent erroneous missing key messages on driver display • Fixes for accuracy of low tire pressure alert • Fixes for speed threshold for pedestrian alerts

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030540-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030540-9999.pdf)

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

## Vehicles listed

- 2026 CHEVROLET SILVERADO EV
- 2026 GMC SIERRA EV

JSON: [/v1/bulletins/11030540](/v1/bulletins/11030540)

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