# Over\-the\-air update 653.40

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: 11024670
- Published by NHTSA: 2025\-10\-31
- Manufacturer's number: 653.40
- Manufacturer's date: 2025\-10\-20
- Campaign id or software version: 653.40
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: HDLM: HDLM \(High Definition Localization Module\)

## NHTSA's summary

•Improvements to the performance of Super Cruise. 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-11024670-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024670-9999.pdf)

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

## Vehicles listed

- 2024 GMC HUMMER EV PICKUP
- 2024 GMC HUMMER EV SUV

JSON: [/v1/bulletins/11024670](/v1/bulletins/11024670)

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