I completed the R&R of rear pads and rotors on my 2020 GT yesterday. It took me 4 hours but I am old and slow. The only hiccups were around getting the electronic parking brake into maintainence mode and getting the pads fitted into the carrier. The service manual process for maintainence mode (for 2018, I have 2020, maybe it's changed) just didn't work for me or perhaps I misinterpreted it. I found a video on youtube and followed that with no problem. Getting the pads into the carrier was fiddly, finally got then installed by installing the inboard pad before reinstalling the carrier and then installing the outboard pad.
The old rotors and pads were very deeply scored, presumably from a small rock that got lodged between the pad and rotor. I have driven on gravel roads and on roads covered in snow and ice that were sanded. I expected to find a rock lodged into the pad but instead there was a deep score in the pad to match the score in the rotor.
Feels good to save $600 over what my dealer wanted to charge for this work.
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