I would like to install e-fans in my truck and have some questions. Where do you tie into for the fans to know what temp to kick in at and also for the AC to be on? If I buy a new kit does it all come pre wired? And lastly I heard fbody fans will fit good, is that true?

Thanks in advance
Antonio

 

Yes lt1/ls1 fans will fit with the 32" radiator, you can buy a plug and play harness from sponsors on here >>>>>>>>>>
You will have to have you pcm tuned to have fans come on and have 1 single wire ran to your pcm to signal the fans on
Hope this helps Im currently puting ls1 fans in my truck here soon just need to make my brackets to fit the fans in

 

If you have the 34" rad you can use the stock 05+ truck electric fans. You could go as far as getting the oem wiring harness for the 05+ trucks too, but the aftermarket one the vendors sell is good too. You actually have 2 pins on your trucks PCM that will signal the fans, provided it's your 04 you have listed.

 

Yep, the 05+ Efans bolt right in.

LS1/LT1 Efans fit with some home made brackets, very simple.


And make a harness.

Get the PCM tuned and its ready to go.

 

 

Here is a good thread on wiring and how they are controlled



https://www.performancetrucks.net/fo...n-33-a-432250/

 

I went with the flex-a-lite 282 kit it was a little expensive but there brand new fans and comes with all electronics and temp sensors and doesn't require computer tune and the kit came with a real easy step by step instructions
Flex-a-lite 282 - Flex-a-lite Monster Direct Fit Electric Fans - SummitRacingEquipment.com

 

If you have a 34 inch radiator I wouldn't go any other route but 05+ fans. The literally drop into place and look 100% original. That being said when I was shopping for mine 05-07 classic fans were $350+ for some reason. On the other hand 07 new body and newer fans were in the 150-200 range. I think I ended up giving 170 shipped for a set of 07+ Dorman fans. The only difference is the shroud has provisions for the clamps that reinforce the tranny cooler lines. This in no way causes any fitment issues on a 99-07. Also my Dorman fans have dual 7 blade fans. The fan setup on my 95 was a stock 07 Tahoe fan assembly that came with a 7 and 5 blade fans. The Dormans flow a PLENTY of air even on low speed. I could idle in the 110 degree heat last summer blowing 38 degree air and the engine temp never creeped up. 03+ trucks allow even better control of the fans with A/C pressure based on/off control but its working great on mine as is.

 

Step by step process of converting to electric Fans.

You want to make sure you wire it in the fan control as well as the AC Recirc door for the high speed relay.
Or, just do the manual switch like I did on mine.

 

I know I'm late on this, but I've been doing some research on the fans and found an interesting variance on the price of the Dorman fans. The only differences that I'm sure of between them is the blade count.

620-652 is the most expensive one and I believe has two 7 blade fans. Amazon price $276.26
620-653 is a lot cheaper and has a 5 and 7 blade fan. Amazon price $165.85
620-654 is the cheapest and has a 7 and 9 blade fan. Amazon price $137.99

Other than that they all look like they should bolt up to the 34" radiator and work just fine. I'm thinking about upgrading from the ls1 fans in my truck. Then I can use the ls1 fans in our Envoy Denali.