4.3L TO LS1 SWAP

[veecubmechanic]

DOES ANYONE HAVE ANY IDEA HOW MUCH HARDER IT WOULD BE TO SWAP MY 4.3L FOR AN LS1. I'VE BEEN READING IN OTHER POSTS THAT THE 4.8/5.3 LS1 SWAP IS PRETTY STRAIGHTFORWARD BUT WHAT ABOUT THE 4.3. I HAVE AN 01 SC SILVERADO AUTO.

[veecubmechanic]

P.S. GUYS, I HAVE THE COMPLETE WIRING HARNESS FOR THE LS1 FROM A 02 CORVETTE. ECM/PCM, AND ALSO THE AUTO TRANSMISSION

[farmtruc]

I don't see why it wouldn't be easy, all of those engine pretty much install the same way, you would need a harness, you got that, and the pcm from a v8, maybe the engine mounts too, but other than that, i don't see why not, go for it, it would be a huge increase in power,

good luck, and don't hesitate to ask questions,


allen

[veecubmechanic]

THANKS FOR THE HELP ALLEN
SO I WOULD NEED THE ECM OUT OF A 4.8 OR 5.3 TRUCK OR WOULD THE CORVETTE ECM WORK?
HAS ANYONE ATTEMPTED TO DO THIS YET?
THANKS AGAIN FOR YOUR HELP

[farmtruc]

You can use any of the pcms, matter of fact, i'm tuing this 4.8 and it has a problem i or others have never seen, here you go (don't be mad i posted on tech hahahah) problem pcm

you'll see i put mine in there and now it works, the vette is the same thing, it did mess with his shift indicator, there isn't a box around the current gear he's in, it doesn't glow, if that makes sense,


allen