2020 Silverado 2.7l Grinding start

[Andrew Weaver]

Hi I have a 2020 Silverado with the 2.7l and it will occasionally make this god awful grinding sound when started. Especially if it’s like the first start of the stay or hasn’t been ran in awhile. 
 

Once it’s warmed up it doesn’t seem to do it but pretty much every cold start it sounds like something is grinding and I can’t seem to find anything else like it online. It happens if I just get in and start it or remote start it. 
 

It’s still under warranty but knowing my luck the dealer won’t be able to reproduce it when I take it in. 
 

I saw a TSB saying it could make a noise due to the new DI but it didn’t describe what specific kind of noise. 
 

Anyone else having this issue or is this just normal? Thank you!

[CamGTP]

The V8 engines have a noise from the oil pump on cold starts in the winter months, possible that same noise is on the 2.7's if they run a similar style oil pump.

 

Mine does it all the time here in Minnesota.

[Supreme Pizza]

 

   Sounds like a bad flex-plate.