It might just be that the calipers are from Brembo on the ATS (unless Brembo makes the OE pads/rotors for GM for this application) but this is a Cadillac dealer that is quoting machining as part of their brake service (pads and rotors) instead of trying to sell me new rotors. I asked them if they don't just replace the rotors with the pads and they said in most cases, no.
These are daily driver cars.