Noise issues during downshift from 2nd gear to first, similar sound with auto stop/start along with occasional thump and rough shifting. Dealers keep saying it's normal when it is clearly not. Found videos on YouTube and forums with others experiencing the same issue. One dealer acknowledged but didn't know what to do with it. I have taken the vehicle to the dealer for the same issue 7 times now and they don't want to do anything about it. I've heard other Tahoes similar to mine that don't have this problem. I think it's time for a lawsuit.