I have read a bunch of posts and I am trying to get some input on a temperature setting for the e fan turn on temp with a stock thermostat on a 6.0 silverado 2500ld. I am going to try to run it with a threaded thermostatic switch in the block for now. So it will have a set turn on point. Later in time will look at a tune.
Also, since the fans have two blade styles, which blade should be on for the A/C only.

 

This is for 05 5.3 efans. It will get you close.