I don't normally go in these threads but I was bored and just looked in here to see wazzup and I couldn't help noticing that my old efan setup was talked about.
If you want the full skinny on this setup, including relay schematics, head on over here:
http://gmtnation.com/forums/topic/2384-my-efan-setup-montanaventure-efans/
Now I say "old" setup because I have since gone back to an '08+ clutch fan. The wire broke on the temp sensor when I did the timing chain job last fall. Reasons I went back to a clutch:
- no automatic control of fans with A/C except using the manual switches
- I had some marginal cooling once on a trip to DC couple years ago when it was mid-90's + humidity+A/C, although it didn't overheat, it reached to almost one tick to the right and wouldn't go down.
- I did not notice any power or MPG change
- A/C performance was OK, not great like now, but just OK, while idling.
That being said, I do have to say that I loved that empty space. I was able to swap the alternator (several times) in 15 minutes flat and just made under the hood look cleaner.
And I've become proficient at removing the shroud and fan.