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Electric fan upgrade

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Old 07-11-2007, 01:55 PM
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Default Electric fan upgrade
I want to convert to electric fans on my truck. Does anybody know what the GM part# is or a good aftermarket piece I could check out?
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Old 07-11-2007, 02:20 PM
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PM DLH2006 for the harness. Buy a set of LS1 fans. You'll need the PCM tuned to turn it on.
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Old 07-11-2007, 02:30 PM
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There are several different options for electric fans/harnesses/tuning for the fans, use the search feature on the site.
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Old 07-13-2007, 12:55 AM
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I bought my 05+ fans on ebay for about $250 as I recall. Then I got the nelson fan harness and had them activate my ecu to turn it on.

I will say that the a/c at idle/in town is improved due to the better airflow, whereas before when I sat at idle for a while I'd need to rev up to 1500-1800 to get enough air moving for the a/c to work.
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Old 07-13-2007, 09:54 AM
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or you can get flexalite stuff. Use the vsc and not have to do a tune. BUT, VSC is garbage...so get a flex a lite kit, nelson or DLH harness, and tuwen the computer

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Old 07-13-2007, 10:48 AM
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Originally Posted by xlcooplx
PM DLH2006 for the harness. Buy a set of LS1 fans. You'll need the PCM tuned to turn it on.

Can't you take a file from a later model truck, with efans, tweak to your tune settings then do a write entire to your PCM..........
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Old 07-13-2007, 11:25 AM
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Originally Posted by 2001c3driver
Can't you take a file from a later model truck, with efans, tweak to your tune settings then do a write entire to your PCM..........
Not on 1999-2002 models you can't. 2003-2004 can simple enable the E-Fans with a simple flash of the computer. The pins required to operate the e-fans (lo and hi speed) on 2005+ models are not used on 2003-2004 models. 1999-2002 models use the pin to command the hi fans to come on, for the HVAC control ... the pin used to command the lo speed e-fans is not used on these early models. So for those trucks it is not as simple (unless you just tap into the A/C enable). Also, it is not adviseable to flash a newer file to an older ECM, there could be compatability issues.
Last edited by 12secSS; 07-13-2007 at 11:31 AM.
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Old 07-13-2007, 11:27 AM
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Originally Posted by 12secSS
Not on 1999-2002 model you can't. 2003-2004 can simple enable the E-Fans with a simple flash of the computer. The pin required to operate the e-fans on 2005+ models are not used on 2003-2004 models. 1999-2002 models use the pin to command the high fans to come on, for the HVAC control. So for those trucks it is not as simple. Also, it is not advisabel to flash a newer file to an older ECM, there could be compatability issues.
I can just go into the program with my CMR program and upload it with my predator. I jsut needed the PN for the fans or a good aftermarket choice.
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Old 07-13-2007, 11:28 AM
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Originally Posted by bgray
or you can get flexalite stuff. Use the vsc and not have to do a tune. BUT, VSC is garbage...so get a flex a lite kit, nelson or DLH harness, and tuwen the computer

That's a sweet setup you got there. Thanks for the pic.
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Old 07-13-2007, 11:31 AM
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Originally Posted by Turbo 6.0
I can just go into the program with my CMR program and upload it with my predator. I jsut needed the PN for the fans or a good aftermarket choice.
Sorry, I was addressing the post right above mine.

Have you looked in the Part Number sticky in the GM General Discussion section?
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