computer harness conversion
Thread Starter
Teching In
Joined: Jan 2005
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From: Thousand Oaks, CA.
computer harness conversion I am putting a 5.3 from an 01 suburban into my 75 blazer. I have the computer and engine, tranny harness. Is there any info available on what has to be done to hook up the harness to make it work? I understand the anti-theft has to be disabled in the computer. Are there modifications required to the harness as well?
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From: Right here at my laptop, DUH!
If you plan on using the later transmission , you'll need to convert the VSS signal to a cable driven signal for your speedometer. Abbott Electronics makes just such a module.
Originally Posted by lmarino
I am putting a 5.3 from an 01 suburban into my 75 blazer. I have the computer and engine, tranny harness. Is there any info available on what has to be done to hook up the harness to make it work? I understand the anti-theft has to be disabled in the computer. Are there modifications required to the harness as well?
You could get factory helms manuals and the 01 suburban underhood and powertrain harness and make them work easy.
mitchell on demand has good pcm pinouts but thats about it.
pcm pinouts help you trace all the stuff you want to dump....egr/air/fuel tank pressure/evap.
You can fool the vats(anti theft) out with a module, or program out with a tuner(edit,hp,flashscan).
I have an extra module it you want it, it came with the engine/trans I bought.
Here is my underhood harness
https://ls1tech.com/forums/conversions-swaps/99135-finished-my-underhood-wiring-harness.html
Thread Starter
Teching In
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From: Thousand Oaks, CA.
Originally Posted by badjuju342
If you plan on using the later transmission , you'll need to convert the VSS signal to a cable driven signal for your speedometer. Abbott Electronics makes just such a module.
Thread Starter
Teching In
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From: Thousand Oaks, CA.
What happens if you don't eliminate the stuff from the harness you don't need? If it isn't used anyway what will happen? When you "eliminate", don't you have to do something with the wire to fool the PCM? I was also told you have to relocate certain wires in the connector to make it work. As to the vats, I will probably have that programmed out of PCM. Thanks
Nothing happens if you dont remove the wiring.
It just looks better.
You dont have to fool the pcm if you delete emissions crap, it will just turn on the engine light.
It will not affect the operation of the engine/trans.
You can edit the certain emission codes so they dont turn on the light.
Relocate wires in which connector?
It just looks better.
You dont have to fool the pcm if you delete emissions crap, it will just turn on the engine light.
It will not affect the operation of the engine/trans.
You can edit the certain emission codes so they dont turn on the light.
Relocate wires in which connector?
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Verdad Gallardo Thread Starter
Teching In
Joined: Jan 2005
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From: Thousand Oaks, CA.
Originally Posted by Gen3Benz
Nothing happens if you dont remove the wiring.
It just looks better.
You dont have to fool the pcm if you delete emissions crap, it will just turn on the engine light.
It will not affect the operation of the engine/trans.
You can edit the certain emission codes so they dont turn on the light.
Relocate wires in which connector?
It just looks better.
You dont have to fool the pcm if you delete emissions crap, it will just turn on the engine light.
It will not affect the operation of the engine/trans.
You can edit the certain emission codes so they dont turn on the light.
Relocate wires in which connector?
Thread Starter
Teching In
Joined: Jan 2005
Posts: 20
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From: Thousand Oaks, CA.
Originally Posted by Muffracing
Post a pic when you get it going. I thought about putting a 6.0 in my '74, but the body is not very good. Are you running manifolds or headers?
Originally Posted by lmarino
At the PCM, not sure which wires or function.
