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View Full Version : GMPP LS3 controller with PWM cooling fan?

samckitt
06-18-2022, 12:30 PM
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. Which is it?

I thought I had it working, but car has been sitting for a while, I have it on in my tune, but when I try to activate it from the scanner tool, nothing happens.

Help

Thanks
Jimbo1367
10-25-2022, 07:05 AM
Try looking for Andrew, aka : projectGTO. (I think)
andrewb70
10-26-2022, 07:23 AM
I only know Holley EFI...I believe John Parsons has dealt with the GMPP ECUs and PWM output.

Andrew
samckitt
10-26-2022, 07:35 AM
I only know Holley EFI...I believe John Parsons has dealt with the GMPP ECUs and PWM output.

Andrew

Andrew, I think you and I experimented with this years ago & I thought mine was working (still not finished), but I think it was just coming on at a slow speed), I have purchased a production ECM flashed with the CTS-V OS, and when I get front cover back on I'll know for sure if it works. (Timing chain was off a couple teeth).