Was it scary seeing all those lights flash? Heck yeah. Finding the plug was annoying. Choosing the tune felt like defusing a bomb. But honestly? Plug it in, scroll through a few menus, pick “Performance” and “91 Tune”, wait out the flashing lights, and turn the key off/on. Drive. Grin. That’s the simple version. My truck finally feels alive again. Worth the butt-clench moment during i... https://kralmod.com/diablo-tuner-5-3-performance-tuning-guide-easy-steps-you-need/