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EVRLET · 04-29-2021, 12:34 PM

You have two options for wiring.

Install to where it comes on with temp switch, no pcm control.

Or install with pcm control but you’ll need to get into the pcm with HP Tuners or some other software to set up e-fans. Then the computer will control the fan. The PCM has to be an LS based pcm.

If you have the 411 pcm already controlling your L31 engine, then you can use HP Tuners on that.

I just installed e-fans in a 2003 Denali and went into the PCM to set it up. If you found the e-fans on a factory suburban, grab the relay box and all the wiring for it. The relay box is attached to the main under hood fuse box. With this, you don’t need any aftermarket wiring kit. But you will need to have it pcm controlled.

The factory relay box looks like this:

04-29-2021, 12:34 PM	#2
EVRLET Registered User Join Date: Aug 2015 Location: Las Vegas NV Posts: 354	Re: 98 silverado electric fan upgrade You have two options for wiring. Install to where it comes on with temp switch, no pcm control. Or install with pcm control but you’ll need to get into the pcm with HP Tuners or some other software to set up e-fans. Then the computer will control the fan. The PCM has to be an LS based pcm. If you have the 411 pcm already controlling your L31 engine, then you can use HP Tuners on that. I just installed e-fans in a 2003 Denali and went into the PCM to set it up. If you found the e-fans on a factory suburban, grab the relay box and all the wiring for it. The relay box is attached to the main under hood fuse box. With this, you don’t need any aftermarket wiring kit. But you will need to have it pcm controlled. The factory relay box looks like this: Attached Images __________________ Customization is what you want it to look like -- not what other people think it should look like Last edited by EVRLET; 04-29-2021 at 12:40 PM.