Hey everybody.... I need some help or some guidance. I have a 2015 GMC Sierra SLT Z71. I am fed up with the way this thing is shifting. Fed up to the point i'm just ready to count my loses and just trade the damn thing in. When i am driving and i pull away from a red light it acts like it hesitates shifting from 2nd to 3rd gear and i'm feeling like i have to damn near push the paddle to the floor in order to get it to shift from 2nd to 3rd. And then don't get me started on when i have to make a 15-20 mph turn and then get get back on the gas.... then it really goes crazy...its like its surging and hesitating all at the same time. I took it to my local dealer a couple of times to have them check it out and of course they say "We cant find anything wrong with it. Its not throwing any codes. Its probably the characteristics of the type if tranny you have or its the active fuel management system." I love the truck but i cant get pass the way it shifts. Has anyone out there had an issue like i am having and if so have you had luck with tunes. As far as changing shift points and all that good stuff.......PLEASE HELP.