I briefly had a 2020 model with the 6.2L engine. I got rid of it as fast as I could.
This is no joke: On the drive home from the dealership on the day that I bought it, with 18 miles on the odometer, the CEL came on and the infotainment display told me that I needed to take the vehicle to a dealership ASAP. I did a U-turn and after 30 minutes of waiting in the customer lounge I was told that the brake booster had failed and that the part was on national backorder.
Long story short, I caused an enormous scene on their sales floor and they finally agreed to pull one off of another new truck on the lot.
A few months later the 6.2L developed the infamous cylinder head / lifter problems on both driver and passenger banks. After being told that it would have to sit for at least 16-weeks while they waited for parts, I raised hell with GM and they bought the truck back under the Lemon Law.
Those trucks are gigantic pieces of shit.