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Old 11-14-2019, 07:24 AM
paulk68 paulk68 is offline
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Default Wiring for Crate LS3

Hey guys starting to research what wiring kit I should use on my crate motor LS3 480HP. can anyone make some suggestions for me? I was looking at the GM connect and cruise since it comes with pedal and everything but also heard the Holley terminator stuff is really good. please let me know what you guys suggest.
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Old 11-14-2019, 07:10 PM
randy randy is offline
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First time Iíve ever wired a car and I instead the connect and cruise with ease.
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paulk68 (11-15-2019)
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Old 11-14-2019, 07:40 PM
dhutton dhutton is offline
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I recommend the GMPP connect and cruise. Simple plug and play.

Iíve used GMPP, Speartech, and PSI. They all have their merits but I feel GMPP might be best for you Paul.

There is a guy on the Camaro forum using Holley for his first swap. He has posted a lot of questions.

Don
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Old 11-15-2019, 05:44 AM
paulk68 paulk68 is offline
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Thank you all so much I think I will go GMPP path!
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Old 11-15-2019, 07:16 AM
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tubbed69 tubbed69 is offline
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Also call Shaun Carter @SMC Performance,he does a kit like GM but it is easier and even cleaner look.I have bought several of these and are so easy to install.They are plug and play with built in relays for fans and fuel pump,throttle pedal,bosses for 02 sensors,mass air flow sensor and mounting kit.

Last edited by tubbed69; 11-15-2019 at 07:18 AM.
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Old 11-15-2019, 08:30 AM
130fe 130fe is offline
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I used the GMPP harness. I haven't had any issues with it in 8 years but the only down fall is you only have one fan output unless you add the PCMOFNC fan add on kit. Kind of bulky but I don't mind.
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Old 11-17-2019, 06:42 AM
CapSS92 CapSS92 is offline
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I made my own harness from the donor LS3 car but I am now switching to Holley. I got tired of having to send off the ECM every time I wanted to change anything and I'm not technical enough to do my own programming. I am in the process of installing a Holley Terminator X for a friend of mine also and I like the Holley stuff. So far it seems to be well built and setting up the software was pretty easy. Most of questions have already been addressed on the Holley EFI forum. I've always been a fan of using GM parts but the programming is what convinced me to change. I'm still keeping the old harness and ECM though. Just in case lol.

Alex
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Old 11-17-2019, 07:28 AM
XLexusTech XLexusTech is offline
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PSI conversions.. Really great customer support.. and well made

https://www.psiconversion.com/?gclid...SAAEgK15PD_BwE
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Old 11-18-2019, 10:52 AM
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dontlifttoshift dontlifttoshift is offline
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Speartech would be my first choice for easy button wiring. The GM fuse panel is huge, the fan control strategy is beyond dumb, and I can't believe they actually still use corrugated wire loom.

TerminatorX if you know what you are doing or would like to be more involved with the install.
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Old 11-19-2019, 12:48 PM
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I used Speartech for the wifes FJ40 LS swap, needed a couple specific add-ons and they were very easy to deal with. Also no problem after the sale when I called with a couple noob questions during install.

I used Hotwire Auto on my Gen3 hemi project and Chris's stuff is really nice also. Hemi swaps are a little more in depth than LS and he walked me through every bit of it. He also does LS.


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