If I am not mistaken, the pcm on an 03 seirra 1500 5.3 has the cabability to run e-fan. I also remember someone making a harness that could be installed and pinned out on the pcm to do so. I am putting a 34" rad and e-fans in the truck now and want it to be as factory as posible. I just need to know if this is true and who this person is. Also I am currently still looking for a rad and the fan and am ready to purchase.

thank for any input!

 

Both PCMforLess and Nelson Performance (sponsors, links to the right>>>) can do the tuning required to turn on the efans, the PCM doesn't do it on it's own. Nelson's harness is very popular, looks stock when properly installed, and works excellently (I love mine). PCMforLess used to offer a harness also, but I'm not sure if they still do.

*EDIT* If you're going to have one of the guys that I mentioned tune for the fans, might as well get a total custom performance tune while you're at it

 

buy the harness from somebody (i also have a nelson harness and it does look and work really good) and then buy hptuners. you wont regret it if your willing to learn and take time to read.

 

DLH2006 is making harnesses. I don't know what he is charging, but I think he is following in white1's foot steps so his price should be a fair bit cheaper than nelson and my harness from white1 works great. Also I agree with blake just get HP Tuners, it's expensive, but well worth it.

 

just needed to know the company and if it was possible, i worked for Speed Inc so programing is no issue. thanks