where I live it is primarily rust taking a toll. I bought a 2001 2500HD silverado 3 years ago with only 135k. Engine and transmission are in perfect shape but it is literally dissolving before my very eyes. I don't mean the body rust that they all have and I don't care about. I mean the brake lines, fuel lines, gas tank straps, and this boggles my mind: The friggin E-brake cable!!! I love MI for many things, but road salt isn't one of them.