Ok. So Heres my write up on Installing e-fans on an OBS with a clutch fan.
First i drained my fluid
Now take off the shroud and get ready to remove the fan.
I used a big crescent and a rubber mallet while a ratchet strap held the fan from spinning. Took a few hits to knock it loose. Once its removed, remove the hoses on the radiator and removed the radiator.
Here is a pic with radiator and clutch fan removed
Lined up the fans and the new radiator away from the truck to test fit and size it.
I placed my new radiator in and re attached all the lines.
Once re attached i placed my LS1 fans in the lower tray and leaned the fans up against the radiator and centered them. After that i thankfully had holes already in the top of the radiator that worked out PERFECT. See below
Here you can see how/where its attached.
At this point i needed a 5/16 square drive socket/wrench to be able to remove the plug in the passenger side block where the thermometer will go for my e-fans harness.
I continued install down below.
![39e2c5d3.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/39e2c5d3.jpg)
First i drained my fluid
![43f54093.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/43f54093.jpg)
Now take off the shroud and get ready to remove the fan.
![ac97821e.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/ac97821e.jpg)
I used a big crescent and a rubber mallet while a ratchet strap held the fan from spinning. Took a few hits to knock it loose. Once its removed, remove the hoses on the radiator and removed the radiator.
Here is a pic with radiator and clutch fan removed
![6e98aee0.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/6e98aee0.jpg)
Lined up the fans and the new radiator away from the truck to test fit and size it.
![f137fb78.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/f137fb78.jpg)
I placed my new radiator in and re attached all the lines.
Once re attached i placed my LS1 fans in the lower tray and leaned the fans up against the radiator and centered them. After that i thankfully had holes already in the top of the radiator that worked out PERFECT. See below
![19290b2f.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/19290b2f.jpg)
Here you can see how/where its attached.
![9f47778d.jpg](http://img.photobucket.com/albums/v684/SamCarroll/GMC/9f47778d.jpg)
At this point i needed a 5/16 square drive socket/wrench to be able to remove the plug in the passenger side block where the thermometer will go for my e-fans harness.
I continued install down below.
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