Looks like GM has issued a stop sale order on a large number of vehicles with the 6.2L engine. Massive recall will be coming next. Apparently after the cars are repaired their oil recommendation will change to use the Dexos R oil specified for Corvettes.
www.thedrive.com

GM Issues Stop-Sale Ahead of Recall for Blown 6.2L V8s in Some 2021-2024 Trucks and SUVs
If you were eyeballing a leftover full-size SUV or pickup from Cadillac, GMC, or Chevrolet, you may have to wait a while.
