The factory floor mats (or any aftermarket laser fit mat) will have the alignment cut outs in them so they snap in place to keep the floor mat from sliding around. I have the factory Z71 mats (which are snap in place fit), and I’m still experiencing this issue. I’m curious if you have mats that are the same. Weather tech, husky, or some off brand that just slides around? I’ve looked mine over and there really isn’t any room for the thing to slide up on the accelerator pedal. I’ve also never taken mine out of the truck since purchasing it.