Got the box aligned on my 2019 at4, it had to be moved over half inch from drivers side to passenger side, looks way better now, iam happy, just the brake squawk noise I get first few minutes when it’s cold , dealer said it’s normally operation , my 2014 didn’t nor did my 2007, 2005, 1999, or the 6 other GM trucks I’ve owned from the 80’s and 70’s,