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Official NBS V6 to GENIII V8 swap Guide

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Old 12-09-2022, 12:05 AM
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Originally Posted by _zebra
yep... it's only been stated in here a million times that the 99-02 harness is different than the 03-07, and you need to get a harness & computer that matches the year of the truck. for the 03+ guys who want to keep the throttle cable (versus an electronic pedal swap), you'll need the harness from a van.

if yours is a manual trans, you'll also need to ensure there's a jumper wire in the fuse block for the clutch safety switch.
ok great how about fuse block would i use a v8 one or keep the v6?
Old 12-09-2022, 07:47 AM
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V8...
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Old 01-22-2023, 12:02 AM
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Originally Posted by jesusv59
Finally got some more time to work on my swap. And im running into an issue with this coector has any one ran into this,

just came across this thread, I ran into this yesterday what did you do for a solution? Thank you
Old 03-17-2023, 06:18 PM
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Originally Posted by jm2223
just came across this thread, I ran into this yesterday what did you do for a solution? Thank you


I ran into this issue yesterday.. I am going too have to repin or should I cut the plug off my V6 harness and match up the colors
Old 03-18-2023, 08:38 PM
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Looks like you will need break the tab off or cannibalize the plug from your old harness.
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Old 03-19-2023, 12:49 AM
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Originally Posted by Gmo253
I ran into this issue yesterday.. I am going too have to repin or should I cut the plug off my V6 harness and match up the colors

i changed my harness from the 02 to a 05 harness and it pluged in normal
Old 03-19-2023, 06:31 AM
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Originally Posted by 1FastBrick
Looks like you will need break the tab off or cannibalize the plug from your old harness.

Wait i just realized what you said can you really just break the tap and it'll plug in ... !!!
Old 03-20-2023, 07:21 PM
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Originally Posted by 1FastBrick
Re-pin an 03-07 classic harness or use a van wiring harness and run a Van OS.

A V6 should already have a mechanical pedal so you just need the right throttle cable from a 99-02 V8 truck.
What's a van os... Operating system .. ??
Old 03-20-2023, 09:40 PM
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Originally Posted by Gmo253
What's a van os... Operating system .. ??
Correct. OS = Operating System
Old 03-21-2023, 12:51 AM
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Originally Posted by 1FastBrick
Correct. OS = Operating System
Guessing the PCM aka ecu


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