So my new GS has brake issues. Not even 1000 miles yet. Sounded to me like a bad wheel speed sensor causing the ABS to activate at low speed braking on dry pavement. But after 2 days in the shop they still can’t determine the true issue. I guess they spent a long time on the phone with techs at GM and the recommendation is to completely replace the calipers, pads, and rotors. Not too concerned with the time in the shop at this point as I leave for a week in Jamaica in the morning. So they have a week to figure it out.