I have a 2004.5 Cummins with NV5600 manual. I've flashed it a few times, but only once since HPT 3.0 came out. Now my tow/haul light flashes on and off, but not really in a sequence, just whenever it feels like it (No fault codes). I need to try and flash it back to stock to see if it gets rid of it, just thought I'd share in case anyone else is noticing this.