Owners of 2021 Chevrolet Silverado and GMC Sierra models with buggy infotainment systems that prevented the use of some system functions now have a fix.

Technical Service Bulletin: #20-NA-221
Release Date: 12/14/2020

Last month we published an article regarding Technical Document #PIT5793, which described a condition where some 2021 Silverado and Sierra owners began to have issues accessing the app shop and other features on the infotainment systems. At the time GM engineering was researching the problem and planned on issuing a system update in the future. Today is that future as TSB 20-NA-221 has been released.

Technical Service Bulletin #20-NA-221 Applies To

  • 2021 Chevrolet Silverado 1500
  • 2021 GMC Sierra 1500

Technical Service Bulletin #20-NA-221 Reported Conditions

Some customers may comment of any or all of the following symptoms:

  • Unable to accept Terms and Conditions
  • Unable to access AppShop or install apps in the radio
  • Information within the OnStar app on the radio could be missing or incorrect
  • Unable to create or log into User Profiles
  • Connected Navigation (live traffic, etc.) is not functioning (base navigation functions correctly)
  • Unable to install apps through myChevrolet/myGMC mobile apps

Vehicle owners have also reported the following issues related to this “bug”

  • Connection error when trying to access the app shop or OnStar Settings inside the radio
  • An Active Hotspot connection seems to exacerbate the issue.
  • Using the OnStar App, owners may get the following message when trying to use any feature related to trailering. “Unable to execute request, account data out of sync”
  • XM Radio showing “inactive” in GM Global Connect- when it is really active
  • A “Connection Error” as seen at the top of this article

Technical Service Bulletin #20-NA-221 Fix

Take your truck to a dealer, who will reprogram the radio.