# 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: 11030524
- Published by NHTSA: 2026\-04\-02
- Manufacturer's number: 661.20
- Manufacturer's date: 2026\-03\-27
- Campaign id or software version: 661.20
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: ACP, AOS, BCM: ACP2 \(ADAS Compute Platform 2\), AOS \(Automatic Occupant Sensing Module\), BCM \(Body Control Module\)

## NHTSA's summary

• Fixes to reduce activations of Automatic Emergency Braking Disabled light. • Improvements to availability for Lane Keep Assist. • Fixes to help ensure proper functionality for Brake Assist. • Fixes for active cabin ventilation. • Improvements to the performance of vehicle software updates. • Fixes to help ensure successful vehicle software updates.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030524-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030524-9999.pdf)

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

## Vehicles listed

- 2026 CADILLAC ESCALADE
- 2026 CADILLAC ESCALADE ESV
- 2026 CHEVROLET SUBURBAN 1500
- 2026 CHEVROLET TAHOE
- 2026 GMC YUKON
- 2026 GMC YUKON XL

JSON: [/v1/bulletins/11030524](/v1/bulletins/11030524)

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