GMC YUKON 2022- car slightly shakes at idle

[Tom-M]

I have a 2022 Denali with the 6.2L in it that was built in at a time when they did not put the auto stop on them. At a red light, it is so smooth, I thought it had the auto stop shutting it down so I had to check the tach. Nope, still running but smooth as glass.