Question: LS3 fan control wire; power or ground?

[randy]

yup. those wires just route to the fuse box so just tap them at the fuse box since you are already messing with them there.

[130fe]

I am glad you posted this up Randy. I am with Shane in not wanting cut my pcm connector wires (plus the fact that my pcm is hidden inside the passenger fender). I have both of the PCMofNC kits (fan and AC bump) sitting in a box in my garage. Been running the Entropy fan controller for the past couple of years but wished you were able to input a VSS signal in (so your fans aren’t running on the highway. Looks like I have found my pre Christmas project after I get my car back next week (getting T56 Magnum and Holley mount system put in).

[NAPA 68]

Great thread and thanks for posting. One of the few things I am not happy with on my LS3 conversion is the GMPP fan control strategy. The seem to always be on at a stop light.

Tim