2018 CHEVROLET SILVERADO LT Engine Problems

Since I purchase my 18 Silverado the transmission has ALWAYS had a shift lag. On interstate especially it has become dangerous. I’ve almost been rear ended a few times bc it won’t shift properly. Even with the proper lane change habits the lag and uneven shifting has almost got me killed. Early on when I got my truck (est 2019) a dealer replaced some of the lifters in my engine. I spent over $40k and have even had to replace stereo because it died. I’m disabled I can’t afford to have major repairs while still making payments. Someone needs to hold Chevrolet responsible. I’ve read enough comments from people who have one and their complaints are the same. Is anyone looking into this?