Hey, it's me again. I've was driving out in the rain this evening when a strange thing happened, the entire cab fogged up! I was driving into Sidney and suddenly it got harder and harder to see. I'm just lucky I had some McDonald's brand napkins in my glovebox for just such an occasion. It was a good time though, manouvering that vaccuum knob on the dash while stepping on the gas pedal just right so the wipers didn't die, while at the same time steering and wiping off the condensation with a napkin. Just out of question though, did Chevrolet originally have a better system than this? Was there possibly a "Chevrolet" embroidered chamois available (haha), or was there an early defroster? My truck has a homemade heater in it, so I can't tell. I won't be looking to replace anything yet though, since the restoration hasn't reached the cab, but I probably should find out beforehand. Any info...?