The full size IRS is an upsized version of the midsize, which is an upsized version of something off of their sedan platforms.Those new Chebbies are a joke, have you actually looked at the IRS setup. I drove a '21 recently and it
The new IRS is incredibly heinous, those lower control arms are like 6" off the ground. The new GM fullsize SUV are okay to drive, they managed to hide the speedo behind the steering wheel. Driver controls dont make sense, it would take some time to learn. The Duramax seems to be a turd and the lifter/engine failures abound in the V8's. New TLC looks promising but i expect it will take time to work out all the issues with the new drivetrain.
A Sequoia with the big 5.7 or 200 series probably among the best SUVs built in recent time. Old GMs pre AFM would go forever with little to no maintenance, interiors would disintegrate but theyll keep on going.
It works, but it wasn’t engineered for a truck to do truck things originally.