Thank you for starting this thread. I just purchased a '22 Sierra Denali (not ultimate) and am terribly disappointed by the bass. My wife has a '16 Yukon Xl Denali and before that a '11 Escalade ESV, and the overall quality I feel was significantly better in both of those. In reading all the posts it sounds like it is just the way it is. This is my first pickup truck. I can't believe this is the case for how expensive these vehicles are. Very disappointing overall. Is there any chance that because of the pandemic or some other supply chain reason they used worse subwoofer components or like forgot to connect them properly? It just doesn't seem possible it could be this bad.