I have a 2015 5.3, non adjustable pedals. I pulled the carpet back a bit and was able to jam a wood shim in there and it achieved the fix (cant see it, does not look bad in my opinion. Much easier than a bunch of bolts). No tools, no cutting, didnt take anything apart. It was not night and day in my case, BUT I for sure do feel it improved throttle response. I feel more connected to the motor. Easy, quick, cheap fix for a bit more of a real feel into the machine.