Just bought a '17 LTZ. I've always leveled these trucks 2" up front but I think I'm going with more a of a sport look on this one. So 2" shackles only, shackles and no block,shackles and 1/2" block or no shackles and remove the factory block only? I don't want any vibration issues since this one has the none what so ever and my other three K2's had some. Thanks guys.