[USSkoval]

My '86 C20 Burb with 454 also has that electric fan. I don't know much about it's operation because (A) my temp gauge seems to read a little high, and (B) my AC system is inop.

But I do know that it kicked on once earlier this year when I was driving around in Orlando traffic. The gauge was reading like 245*-250*, but I suspect actual temp was 220* tops.

I also know that on a cold start, the clutch fan is pulling enough air that it causes the blades of the electric fan to spin, making it look like it's turned on.