Hi from my knowledge you’re using the 6 piston wrong rotor for that set up. I did the ppv calipers too but I order oem ppv rotors no one made them 1 year go when I did the swap. But now power stop makes them and raybestos and gm discontinued the #84865905. And the rotor you bought are for gm brembo 6 piston upgrade kit that use 16” rotor not the HEAVY DUTY ppv. The braking surface is different from 2.5” to the ppv rotor being 3” and how I know because I bought Dynamic Friction 604-47079 but to do the ctsvbrakeswap.com zr1 brake conversion and I compared both they are very similar. I’m sure you won’t have problem just that your pad probably over hanging and not making 100% contact.
Good to know, I will inspect it tomorrow to see if the pad is slightly too large for the rotor. I'll report back.
Done about 300 miles and this setup makes the braking effortless on this truck. Love it.