extreme single-side tire wear and suspension questions

Suspect your Chevy chassis has IFS.

Very easy to tell-- look under the front. Do you see "AL arms on each side like a Chevy PU or do you see a solid steel beam going all the way across. If A arms, it is IFS. IFS has coil springs, solid has leaf springs.

It will also have air bags inside the front coil springs. If not properly inflated, severe mis-alignment will result. The exception is that there are some aftermarket stronger springs that do not require the air bags.

So, if IFS, check air bag pressure.