I just bought a 08 2500hd. It had efilive and the dsp5 installed in 2013. The previous owner didnt know much about the tune, just left it in one position for towing. We'll my 3yr old decided to play with the knob so now I'm not sure what program it's on. Is it safe to turn the know while I'm driving or should I be stopped. Any help in teaching me about this would be appreciated!