GMC app Diagnostics/Onstar

[SwampDog]

I just had a display blackout, taillight and daytime running light failures. Repaired under warranty. My app "real time" diagnostics showed all good, even through the repair. No mention in my monthly diagnostics report. Useless? No useful response from GMC or Onstar.

 

[WalleyeMikeIII]

May not be one of the systems that is monitored...I think it only monitors the ECM, TCM, Onstar System, Fuel Level, and Tire pressure...BCM may not be on the list.
Likely you could have pushed the blue onstar button and asked for a remote diags and gotten info about your Instrument Panel being out.