LS Swap Wiring Harness – Plug-n-Play vs. DIY Harnesses

You can buy a Plug-n-Play LS swap wiring harness or you can make a DIY LS swap harness. Pat walks through what Plug-n-Play harnesses do that makes them so popular. For one, every wire is clearly labeled to show where each plug & injector goes. Additionally, each of our wiring harness kits include detailed instructions and clearly labeled fuses. You can save a LOT of time going with a labeled, pre-made wiring harness.

Speedway GM Engine Wiring Harness, 1999-02 LS1
(91099021)

Speedway 2004-2008 Vortec V8 Wiring Harness, Extended
(91004084)

[betosgarage]

I just used a junk yard one & flashed it. Re worked it & Cut the wires & sensors u won’t use . Basicly free w the engine

[dimefever]

This is great if it's a rebuild ls, not so much for a salvage yard drop in, cost doesn't offset.

[johnbehneman]

GREAT VIDEO PAT!!! I AM ALWAYS LEARNING ABOUT THE LS MOTOR. GREAT VIDEO AND EDUCATION. THANKS FOR SHARING. I LEARNED SO MUCH.

[kdhpk]

Can you integrate the factory donor harness with the vehicle's factory harness? I have a running 99 S10 Blazer and don't want to hack up the interior.

[GclcG]

I have a 2005 gto that was in a fire.. all of the wiring harness are gone. This Car will be strictly a track car only and I wanted to know if I can use this harness as a replacement ? i just need it to start run and have the headlight be operational.

[kracsi]

I have a stand alone harness for my 92 c1500. Where in the truck do I connect the 9 wires that don’t have plugs

[josevaler]

hi pat i need to no i have a 2014 ctsv 6.2 motor and wired harness and computer i want to put it in my 1996 impala ss so what do i need to start

[carlosflores-hsbz]

Hi I’m swapping a5.3 LS to my49 Chevy truck and keep it fuel injection what harness should I use

[timgingell]

How much is this harness??
Will it work with a LS 3 / 5.3ltr.???

[alchampion]

I’m wanting to run my Lt1 with a 0411 ECM, do you offer a harness that can do this?
I’d appreciate any advice concerning the Lt1 up grade

[kevinw]

Can I order a harness that includes a 4l80e and is drive by wire?

[here_to_watch]

Can you leave the trans wires and just have it tuned out of the ecu ? I want a harness with them but not gonna connect them until the 700r4 goes out.

[JuanLopez-mlsi]

What do you have to do if I wanna put a ls 5.3 in my 1983 c10 and what kind of computer do I need a wiring?

[valeriepickens]

Hey Pat, ...I'm shaping a 6.0 LS into my 1998 v6 Firebird.
You said, that all we'll need is that wiring harness and the LS PCM.
Is that still true in my case?

[avatarstore]

I did not get instructions with my purchase of your harness, how do I get that manual,

[ericreader]

I have a 1965 chevelle I'm putting a 5.3 ls3 in it and I want to put twin turbos so what kit do you recommend?
I didn't know how many fuses I need but I counted all the items in thr car and came up with 20

[olivebranch]

Do you need a headlight harness with the stand alone

[Jenkins]

Do you make a harness where I can run the ls engine with my factory gauges and 5 speed trans ? 5.3 ls going in a 2008 pontiac solstice gxp turbo, running aem boost and wide band gauges that are already in the car

[ClevertymeZ]

+Speedway Motors, what company makes the LS wiring harness, like the one in this video? I'm thinking PSI.

[mikewhitton]

I have a 91 yj and a 97 dodge I want to put the v8 in my yj do you make a wire harness for something like that?