I have a 94 S-10 pickup; it's an "SS" model. There is a small switch on the dash below the fog lite switch that has an "I" and an "O" on it. I can't seem to find out what it does. Does anyone know or have something similiar? It looks like a factory switch and is only like 3/8 wide by about 1 inch high, and is a rocker switch. Thanks all.
