Hi all, this thread has been great to revisit all of the research everyone has done. I do not have PPV brakes, but I put a used set of the GM Performance Brembo 6 piston calipers on my 2018 Tahoe RST when I got the truck (used, had 20k miles on it). The GMPP Bembo calipers were out of a junkyard and came with used pads (Brembo OEM, were ~80% worn) but I put PowerStop Z36-1910 pads and Dynamic Friction 90047079 blank rotors on when I did the swap to have all fresh stuff and the setup worked well for ~20k miles (SOOO much better than the dinky OEM front brakes) but then I felt some vibration from rotor warp that got progressively worse. Pads were fine, so I swapped rotors to a set of blank Centric CEN-120.62180 rotors and again, after ~20k miles I got pedal vibration and pad kick back. At that point the PowerStop pads were worn down to indicators so I put in the used OEM Bembo pads that I got with the calipers with a set of R1 Concepts 63147079 drilled and slotted rotors. Side note - The Power Stop pads have nowhere near the bite that the OEM Brembo pads do when cold, do come around with some heat, but just not nearly as good pedal feel.
I am at about 20k miles since putting those OEM Brembo pads and the R1 rotors in and the pads are starting to hit the wear indicators and again I have rotor warp and pad kickback, and lots of vibration feeding into the truck under harder braking.
I am admittedly a hard and late braker (my other car is a 2019 ZL1 1LE and I might drive the Tahoe like it is capable of the same things) and I do tow a car trailer with car (ZL1) occasionally. But that is the point. I put the brakes on to be able to handle..... well, me.
I am about to do pads and rotors again and this time I opted to get some GM OEM stuff to see if I can get more life out of the rotors before they are warping. I ordered the GM OEM 1711202 pads off Rock Auto and found a set of the GM PPV 84879622 rotors on eBay. It's roughly double the rotor cost of aftermarket and three times the price for the pads over aftermarket. I am hoping the higher quality material of an OEM rotor with OEM pads will hold up, and the pedal feel and performance of the Brembo pads is worth the extra money in my mind.
Not sure if anybody has combined the parts I am, but figured this might help others. I will try to measure piston diameter in my calipers when I have it apart as well.