I had to google to see what the "Light Load Tire Pressure" button was on my '13 2500 6.7L and it lead me to another question. Do you guys take your tire psi down and go to the light load / low tire pressure settings when making longer trips where you wont be towing? Does it make that much of a difference? I'm about to make a 1000+mi trip with the wife (w/ leaf springs) and I'd like to keep things as smooth as possible