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Thread: GMPP LS3 controller with PWM cooling fan?

  1. #1

    GMPP LS3 controller with PWM cooling fan?

    Who has successfully done this? I have heard it CAN be done, and heard it CAN'T be done....????

    I am using a C6 Corvette fan module.
    I have heard the PWM signal is pin 64 on the J3 connector, and have heard it is pin 49.

    I have it on in my tune, but when I try to activate it from the scanner tool, nothing happens.

    Help

    Thanks
    Last edited by samckitt; 06-18-2022 at 09:30 AM.

  2. #2

  3. #3
    Senior Tuner
    Join Date
    Nov 2006
    Posts
    2,608
    It shouldn't be a problem.

    heads up though.. That module, the wiring, connector too it, etc.. can all be a pain the ass.

    We used to sell a kit that retrofitted them to other cars with E67's and E40's. They worked well but the modules had a decently high failure rate and they would smoke that big three pin connector occasionally. The fan doesn't flow a lot. We've actually retrofitted a couple C6's with a set of dual spals or LS1 corvette fans and had much better cooling.
    Tuner at PCMofnc.com
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  4. #4
    Quote Originally Posted by Alvin View Post
    It shouldn't be a problem.

    heads up though.. That module, the wiring, connector too it, etc.. can all be a pain the ass.

    We used to sell a kit that retrofitted them to other cars with E67's and E40's. They worked well but the modules had a decently high failure rate and they would smoke that big three pin connector occasionally. The fan doesn't flow a lot. We've actually retrofitted a couple C6's with a set of dual spals or LS1 corvette fans and had much better cooling.
    I have found out since posting this, that the GMPP E67 ECM does not have the same circuit board as the production E67 & does not contain the electronics in it to drive the PWM fan.

  5. #5
    Tuner in Training
    Join Date
    Jan 2012
    Location
    South Dakota
    Posts
    44
    I was in the same boat and ended up using a Vintage Air standalone PWM kit. Just have to tap in a separate temperature sensor. Works well. Only part I didn't like is for the A/C it's an override and makes the fan run at full speed whereas the factory ECU uses the pressure sensor to help control the speed.