I have a 2022 LT1. The local tire shop manager felt comfortable putting a pair of 275 wide Nitto 555R2 tires on mine. KingLT1 and others here on the forum have also suggested and endorsed that. I don't think you can go wider than that though. The 275s are actually a bit wider than the "recommended" max width for these 8.5" wide wheels.
Jim G
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