While with our new 2021 the brake noise only happens on the very first braking after sitting overnight, and not each time. Its a very mild noise . I reported it to the dealership and I also spoke with some pretty savvy brake guys I know . They all said the same thing, its a tad of surface rust on the rotors, due to the rotor material and probably not the pads. In high humidity area's or humid nights, this can occur even with the BEST cars. But it should only occur once , maybe twice from a cold start. The dealership told me the same thing but they also said if it continued while driving they want to look at it. They also told me this is common on ALL GM cars , not just the Traverse. My former Dodge Caravan ( traded it) did the same thing after installing new rotors and pads , Go figure. I also installed cheap pads on the Caravan one time and it made noise every time I hit the brakes. A God awful howling . I do believe its a pads vs rotor material thing going on . A match NOT made in heaven !