There apparentley is a change on how to disable the "active noise cancellation" in 2019 vs 2016-2018. On you tube for the 2016 - 18 Malibu's, it shows a very easy fix to disable active noise cancellation. You simply lift up the trunk mat on the passenger side, locate the audio power amp mounted on the back of the wheel well & just cut the top purple wire. We just brought home our 2019 & guess what ?? Chevy changed it & there is no longer a power amp located in that spot ............ What now ????? ................ Does anyone out there know ?? ....... I desperately want to upgrade the factory speakers, but don't want that low end rumble. Do the 2019's even have "active noise cancellation" ?