One of my very close friends made a couple of real nice nuts that will screw on the waterpump pulley threads where the stock clutch fan would normaly be ...everyone with Trailblazer ss's that went with efans has these nasty rusting threads on the waterpump pulley ...there have been several guy's on the other site that have silverados with efans and the nuts work on them also , so i thought I would come on here and offer you guy's the same nuts if they will work on your trucks ...Here is the link ..

http://www.tbssowners.com/forums/showthread.php?t=44644

If you have any questions please feel free to email Tom ( the manufacturer of the nuts ) at t-mac_cylinders@msn.com

 

I'm buyin one. The silver flat one.

 

I'm getting ready to do the '05 efans swap on my truck and just ordered one of these badass nuts in the "flat" style anodized black!