LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LT1 complete with ECM/Harness

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Old Apr 29, 2010 | 02:23 PM
  #1  
New2Chevy's Avatar
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From: Wyoming
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
LT1 complete with ECM/Harness

Thanks to anyone who has an answer.

I have an 86 Z28.

What wiring would I have to do if I swapped in an LT1 that has the tranny mounted to it and the full wiring harness/ecm already with it?

I read somewhere that it's only 5 wires, if you already have the LT1 harness/wiring/ECM.

Is this correct? If so, what 5 wires from my third gen are used?

I HATE wiring.

Also, will I have to swap in a 4th gen console, to work with the new tranny shifter location, or is it the same as the 700r4?

Last edited by New2Chevy; Apr 29, 2010 at 03:17 PM.
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Old Apr 29, 2010 | 03:23 PM
  #2  
1981LT1's Avatar
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From: San Antonio
Car: 1981 Camaro; 1986 Z28
Engine: LT1; LT1
Transmission: 6 speed; 6 speed
Axle/Gears: 3.73; 3.42
Re: LT1 complete with ECM/Harness

You can do a quick search for the specific pin locations but your orange and pink wires are the most important, besides your grounds of course. The shifter should not change, especially if the car already had a 700r4. All you need to do is swap the shifter brackets on the transmissions and the stock shift cable will bolt to the 4l60e.
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Old Apr 29, 2010 | 03:41 PM
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New2Chevy's Avatar
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From: Wyoming
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
Re: LT1 complete with ECM/Harness

So I just have to change the locations of some wires that are in the plug that are in my third gen and wire in the wires from the LT1 into the "engine side" of the plug accordingly?

I assume the plugs are shaped differently or the wires are routed differently in the plugs, between the 97 Camaro and the 86 Camaro.
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Old Apr 29, 2010 | 04:44 PM
  #4  
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From: Washington D.C.
Car: 1985 Z28
Engine: LT1
Transmission: T56
Axle/Gears: fourth gen 3.42
Re: LT1 complete with ECM/Harness

https://www.thirdgen.org/forums/ltx-...g-dummies.html

read the stickies, it has been covered in great detail

~Steven
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Old Apr 29, 2010 | 06:11 PM
  #5  
New2Chevy's Avatar
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From: Wyoming
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
Re: LT1 complete with ECM/Harness

Thanks. I'll just read and read until I understand it. I HATE wiring.
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Old Apr 30, 2010 | 09:19 PM
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Re: LT1 complete with ECM/Harness

me too.
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