I'M TRYING TO UPGRADE MY NOISY POWER ROBBING USELESS CLUTCH FAN ON MY 03 5.3 SIERRA TO THE 05,06 DUAL ELECTRIC FANS I HAVE FOUND A DIRECT FACTORY LOOKING PLUG IN HARNESS FROM A PLACE OUT IN TEXAS BUT I'M TRYING TO FIND THE DUAL FANS WITH OUT HAVING TO SPEND BUKU BUCKS. I'VE CKECKED EBAY, ALL MY LOCAL SALVAGE YARDS BUT NO LUCK. ANYBODY GOT A SET BY CHANCE THEY WANT TO SELL(I KNOW GOOD LUCK RIGHT?) ANY HELP WOULD BE GREAT

 

There are kits on ebay but first you'll want to measure you radiator corr and see if its the 28 or (I think) the 34. By corr I mean dont measure the tank on the side depending on which one you got you might be able to use a LS1 fan. Get it from a junk yard. Were did you find the harness is it nelson performance? By the way I thought the 05s had the efans.

 

Oh and I forgot to mention if it is nelson you will want to get a tune also. Unless you dont care that they will run all the time. Heres a link for you to. BAM
http://cgi.ebay.com/ebaymotors/GMC-S...ayphotohosting

 

Here is another one BAM http://cgi.ebay.com/ebaymotors/ws/eB...:IT&ih=014

 

yeahmine is a 03i saw the complete fan set up for the 05on ebay about a month ago, but at the time i didn't need them thats how i found out about the nelson perfomance harness(thanks by the way i didn't think about them staying on all the time) this way it'll look factory, hey thanks for the links.

 

If you want the thing to look stock after you install the electric fans just put your fan shroud back on. I did mine that way and the only reason you can tell I even have electric fans is the fact that you can hear them running. Also if you just wire them up on a toggle switch you can turn them on and off. You only need the fans while moving at low speeds. I shut mine off from 45mph and above and my temp never rises above normal operating temp.

 

If you get the harness thew Nelson and the tune they wont stay on and you will love the tune trust me.

 

really? how does it work do you send of your ecm? i guess i should wait till i figure out what i'm gonna do about a cam swap and have it tuned then? i'm just worried about something going wrong then i've got to send it back out, but i had been wondering about their tune, i've been on their site a little so is it still streetable? i know it sounds stupid but did it kill your milege? i tow with mine quite often. sorry to ask so many questions[8D]