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December 10, 2020 Service bulletin

This technical bulletin provides programming information for Radio Software Version U150 Update to correct...

Chevrolet technical service bulletin 20NA199 for 2020 Chevrolet Silverado 1500, 2020 GMC Sierra 1500 and 2020 Chevrolet Blazer and others.

Bulletin number
20NA199
Component
Electrical system: software
Summary
This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU.

Owners of these vehicles have filed 429 complaints in the electrical category.

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