What is the difference on the tunes when you say EFI live, is it adjustable tunes. relentless installs a EFI delete tune it's not adjustable they said they can bump up the HP at the install, but it doesn't have multiple tunes. ThanksI got my 2017 Denali deleted right after Christmas. Itâ€™s a EFI Live tunes but custome tunes by PBD Diesel out of Selma. Totally new truck. Highly recommend yâ€™all guys doing it, very affordable. Itâ€™s not what everyone thinks these trucks are running to get deleted.