What's involved in lsx swap?

[willinthe985]

What exactly is involved into swapping a gen III engine into an obdII truck? Is it just a simple swap and re-pinning the wiring harness to work with the newer ecm, or is there more custom wiring involved? I'm just confused because I see all these badass swaps and they seem pretty straight forward. Sorry if this is a dumb noob question I should already know.

Thanks,
Will

 

[Greg]

check with mike, he has done the lsx swap and he should know quite a bit about the questions you are asking.

 

[willinthe985]

Found this step by step how to:
http://www.hotrodlane.cc/PDFFILES/Lisa%20Tahoe.pdf

Wish I would have found this before posting, but now everyone else gets to see it now.

 

[Greg]

nice find man

 

[willinthe985]

Yeah, just one thing has me confused, they're running both ecm's. Is that necessary?

 

[CodyB]

Im just guessing at this point, but you will probably need the engine, trans, computer, and harness... The fun would come in wiring the cab into the new harness, the cooling lines, thats what I can think of off the top of my head.

 

[Mike]

I cover almost everything in my thread, let me know if you need any more specific help.

 

[willinthe985]

Mike, I just read through you're thread real quick. I still don't understand why you used both ecms. Wouldn't using the 6.0's ecm be like a 0411 swap?

 

[Mike]

The original ECM could be removed, it was just easier for me to leave it as it was.

 

[noremac]

The original ECM could be removed, it was just easier for me to leave it as it was.

does it serve any purpose, or make anything function??