# Over\-the\-air update 661.21

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: 11030534
- Published by NHTSA: 2026\-04\-02
- Manufacturer's number: 661.21
- Manufacturer's date: 2026\-04\-02
- Campaign id or software version: 661.21
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: VCU: VCU \(Virtual Cockpit Unit\)

## NHTSA's summary

• Fixes occasional rear camera display issues when shifting to reverse • Improves HVAC optimization for remote start performance

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030534-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030534-9999.pdf)

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

## Vehicles listed

- 2024 CHEVROLET COLORADO
- 2024 GMC CANYON

JSON: [/v1/bulletins/11030534](/v1/bulletins/11030534)

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