In my turbo LS my cooling fan was not coming on, checked out the fuse and it was blown. replaced fuse and it worked, now today i let it idle for 10 minutes and it never came on, but then again the temp still stayed on the cold side a bit. What couldve blown the fuse, is it the fan going bad? lemme know guys. thanks

 

It could be excessive resistance.
A relay going bad or a short can cause resistance.