# Over\-the\-air update 661.20

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: 11030537
- Published by NHTSA: 2026\-04\-02
- Manufacturer's number: 661.20
- Manufacturer's date: 2026\-04\-02
- Campaign id or software version: 661.20
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: ACP: ACP \(ADAS Compute Platform\)

## NHTSA's summary

• Improvements to accuracy of Park Assist messaging. • Fixes to improve performance of driver assistance systems and rear view camera. • Improvements to responsiveness of rear view camera. • Fixes to address Super Cruise disengaging erroneously.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030537-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030537-9999.pdf)

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

## Vehicles listed

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

JSON: [/v1/bulletins/11030537](/v1/bulletins/11030537)

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