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 shouldnâ€™t line up with the Base rotor, but it does!
I even tried the 2008 rotor, but the height on that is 2.19â€ so it doesnâ€™t line up with the center line of the caliper, the diameter 10.7â€ ; Â½ â€œ larger should work better contacting the pad surface. Donâ€™t know what they used to build this brake assembly.
Iâ€™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