I have the Derale temp probe/relay kit on my LS1 fans. No problems so far.

 

Stewart...
lets try and meet up again..
I will give you my old VSc, and see if that is the problem..
also make sure you get that temp probe covered on the tip...
like 02 Denali said that may be causing it to read wrong..
I know it's getting power, but for some reason it's not seeing when to turn off, and when to turn on..
let me know..
Later,
Daniel

 

Go to the junk yard and you can get them for $75.

 

What do I need to use electric fans? Is it an easy install? What is the difference b/t the ls1 fans and aftermarket fans? What do I need to look out for in the junk yard(parts)?

 

Used LS1 fans will be cheaper. It's an easy install for someone with a fair amount of electrical knowledge. If you don't feel confident with wiring, then get someone who does to help you because there could be a chance of a vehicle fire from poorly wired fans.