I have a 2021 same issues…
I have a 2021 same issues with the 2.7 turbo. I have 44k miles. GM has done nothing for me. Dealership has had my vehicle for 5 months and can’t fix it. I will be forced to trade it into Chevy because other dealers say it has no engine. Chevy/GM suck and their customer service sucks. Never again. When I trade it in, I’ll take the new one and trade it in on a Toyota. Screw buying American vehicles, never gain.