Fan Blower

[Steeveedee]

My '70 C20 with AC shuts the fan off. It is possible that a later switch has been installed, given the age. I don't know if trucks ever got the "Flow-Through Ventilation" package like cars did. This flowed air even in the "off" position to keep the passenger compartment clear of smoke, IIRC what the commercials said. In that case, it was really "Low--to-High", with no real off. I also don't know if putting a switch from a car with that feature in the truck (if that is what happened) would make then fan run in the "Off" position.