A big thing the software update does is not strand a guy if one of the exhaust sensors freaks out. Older calibrations will force a guy to stop safely, the shut the truck off, not allowing a restart for about an hour. Sensors are more reliable now as well. Now you can keep driving it under limited speed until you can take it to be serviced if a pyro fails. Last one I did that was deleted already has updated h&s files available. Returned to stock, updated pcm, uploaded new h&s files, and away he went. Pretty simple really, but not necessary for deleted stuff.