GMPP E67 ecu and fan control
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Teching In
Joined: Apr 2015
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GMPP E67 ecu and fan control 
I was looking at the pcm of nc gmpp fan harness to get 2 speed operation. Does anybody have any experience with it? Currently my fans only come on high and dont shut off. Will this harness solve this issue? I currently dont have VSS as the crate ls3 is hooked up to a Porsche transaxle.
Last edited by Robstevens; Mar 28, 2022 at 08:00 PM. Reason: .
Thread Starter
Teching In
Joined: Apr 2015
Posts: 23
Likes: 4
I have installed the PCMOFNC fan harness in my GMPP E67 harness. I can try to answer any questions you might have. You have to install their patch file into your tune file. Works pretty good.
When you say your fans only come on on HIGH, is that with the GMPP harness or PCMOFNC one? The GMPP one is designed to work like that (it only has one fan trigger temp). The PCMOFNC one has two trigger, low is approx 200 and high is approx 215. Mine has never gotten above 210 so far (sitting in Traffic with AC on).
When you say your fans only come on on HIGH, is that with the GMPP harness or PCMOFNC one? The GMPP one is designed to work like that (it only has one fan trigger temp). The PCMOFNC one has two trigger, low is approx 200 and high is approx 215. Mine has never gotten above 210 so far (sitting in Traffic with AC on).
