Hi all! I thought I’d post my findings in an effort to help people with their decisions.
2020 AT4, Readylift SST, 20x9 Fuel “Crush” wheels with +1 offset, 275/65R20 FALKEN WILDPEAK A/T3W tires.
I had a little rubbing. Very, manageable and mitigated the issue by trimming the plastic only. You genuinely cannot tell where I trimmed whatsoever, and took my time with a utility knife and a little sandpaper.
Below the bumper are two plastic spoilers. The outermost ends of where these two spoilers bolt together, is the issue. It’s very obvious, and quite honestly, a poor design on GM’s part. Believe it or not, by trimming off these two connection points, the wheel wells look cleaner, and better than factory. Structural integrity is not compromised in any way, shape or form, and no metal has to be touched. I am more than happy to post pictures is there is an interest.