# Over\-the\-air update N25\-250520

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: 11018709
- Published by NHTSA: 2025\-05\-30
- Manufacturer's number: N25\-250520
- Manufacturer's date: 2025\-05\-05
- Campaign id or software version: N25\-250520
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: BCM: BCM \(Body Control Module\)

## NHTSA's summary

Software Update for your 25MY Chevrolet Silverado / GMC Sierra: • Enables the active cabin ventilation feature. • When windows are remotely lowered using the key fob, the HVAC blower will turn on. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11018709-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11018709-9999.pdf)

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

## Vehicles listed

- 2024 to 2025 CHEVROLET SILVERADO 1500
- 2024 to 2025 GMC SIERRA 1500

JSON: [/v1/bulletins/11018709](/v1/bulletins/11018709)

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