# Over\-the\-air update 662.20

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: 11035429
- Published by NHTSA: 2026\-08\-01
- Manufacturer's number: 662.20
- Manufacturer's date: 2026\-07\-16
- Campaign id or software version: 662.20
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: AOS, BCM, ELM, FCM, ICS, ICCM, PDR, TCM, TPIM, WCM: AOS \(Automatic Occupant Sensing Module\), BCM \(Body Control Module\), ELM \(Exterior Lighting Module\), FCM \(Front Camera Module\), ICS\_Info \(Integrated Center Stack\), ICCM \(Integrated Chassis Control Module\), PDR \(Performance Data Recorder\), TCM \(Transmission Control Module\), TPIM \(Traction Power Inverter Module\), WCM \(Wireless Charger Module\)

## NHTSA's summary

• Fixes to help ensure successful vehicle software updates. • Improves how center display adjusts to lighting changes. • Improved warnings when a key is missing. • Better tuning for interior lighting in Stealth mode. Improvements to automatic low beam headlamp logic. • Smoother dimming and transitions from day to night. • Improvements to provide more accurate speed limit detection on the driver’s display. • Improvements to the availability of driver assistance features and fewer notifications or warnings. • Fixes to help ensure driver assistance features remain functional when the windshield freezes. • Fixes to help prevent loss of Performance Data Recorder functionality and to protect battery health. • The Transmission Fluid Life gauge will reset properly and show a more accurate reading. • The eAWD indicator will activate less frequently during normal driving conditions. • Fixes a known iPhone 15 charging issue that affects some devices

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035429-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035429-9999.pdf)

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

## Vehicles listed

- 2024 CHEVROLET CORVETTE
- 2024 CHEVROLET CORVETTE E\-RAY

JSON: [/v1/bulletins/11035429](/v1/bulletins/11035429)

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