# Over\-the\-air update 661.41

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: 11032923
- Published by NHTSA: 2026\-05\-26
- Manufacturer's number: 661.41
- Manufacturer's date: 2026\-05\-11
- Campaign id or software version: 661.41
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: ARB, ECM, IPC: ARB \(Articulated Running Boards\), ECM \(Engine Control Module\), IPC \(Instrument Panel Cluster\)

## NHTSA's summary

• Improvements to driver display information for Diesel Exhaust Fluid \(DEF\) range including drivable range in miles, low DEF warnings, and maximum speed warnings. • Improvements to start reliability and reduced check engine light activation. • Improvements to turbo system diagnostics. • Improvements to reliability when extending the running boards on your vehicle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032923-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032923-9999.pdf)

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

## Vehicles listed

- 2024 CHEVROLET SILVERADO 1500
- 2024 GMC SIERRA 1500

JSON: [/v1/bulletins/11032923](/v1/bulletins/11032923)

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