02 - 04.5 silverado duramax Cab/Body swap

nickj704

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Jun 20, 2022
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has anyone performed a body swap/upgrade form the 02 to the 04.5 body? the body harness is not matching up with the existing harness and I need help with what it will take to either re-pin or splice together a harness that will allow the systems to operate.
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
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completely different architecture between 01-02 and 03-up. are you trying to take the 04.5 cab and interior wiring and plug it into the 02 fuse block under the hood?
 

nickj704

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Jun 20, 2022
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completely different architecture between 01-02 and 03-up. are you trying to take the 04.5 cab and interior wiring and plug it into the 02 fuse block under the hood?

I am looking for the information to make that happen. I know i need to either re-pin the connector or find the necessary information to show what needs to be modified to make it happen
 

2004LB7

Well-known member
Dec 15, 2010
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Norcal
Go to GMupfitter.com and search their body building manuals for the electrical diagrams. from there you can find all the pinouts and diagrams you will need to see if you can make it work
 

TheBac

Why do I keep doing this?
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Apr 19, 2008
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You have to move literally EVERYTHING electrical......dash, HVAC, door motors, lights, etc including all wiring harnesses, from your 02 to the 04 cab.
 

Cougar281

Well-known member
Sep 11, 2006
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St Louis, MO
You have to move literally EVERYTHING electrical......dash, HVAC, door motors, lights, etc including all wiring harnesses, from your 02 to the 04 cab.
I think he's trying to stick an 04 cab on an 02 chassis... In that case the opposite, and arguably easier is the case: need to replace all underhood 02 wiring - fuse block, trans harness, etc, with 04 parts.

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nickj704

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Jun 20, 2022
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Can someone provide a harness connector and pin out for the body harness from an 04 cab.

And a body harness pin out from an 02 cab.

Only need the pin and connectors that come out under the hood.

Where can I find this information?
The Haynes manuals do not provide this information