good idea, but the GT center hole is 2.45" and the base model is 2.17", as well height diference of .97", Theoretically even the GT caliper shouldn’t line up with the Base rotor, but it does!
I even tried the 2008 rotor, but the height on that is 2.19” so it doesn’t line up with the center line of the caliper, the diameter 10.7” ; ½ “ larger should work better contacting the pad surface. Don’t know what they used to build this brake assembly.
I’ll let GM figure it out; I was looking for an easy fix to keep the larger brakes, but looks like more of a headache. Thanks for all the suggestions