Official NBS V6 to GENIII V8 swap Guide

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06-06-2018, 02:05 PM

#251

RedXray

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Quote:

Originally Posted by _zebra

granted it's been 9yrs, but i think i carefully popped them out of the bracket to separate them enough because i do remember using one of those little tubing cutter wheels that you tighten & roll around it until it cuts through.

Thanks... I'll have to take a closer look, at first inspection I couldn't see anyway to separate. I did notice the bracket seemed to be made from two pieces.

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08-24-2018, 03:58 PM

#252

Evan Duke

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Wiring harness under fuse box

Im am swapping an 09 LY5 into my wifes 09 4.3 silverado. Everything is going good except this big connector under the fuse box where the engine harness plugs into the body harness.....why is nobody talking about this and what did i do wrong?

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08-24-2018, 04:08 PM

#253

Evan Duke

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Pictures

This is the connector

Body side

5.3 engine harness side

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08-25-2018, 06:34 AM

#254

Chado2448

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Because this thread is about nbs trucks not nnbs.

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08-25-2018, 07:21 AM

#255

Evan Duke

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Ohhhhhhh. Had no idea. Well any help would still be greatly appreciated. I dont see any way around replacing the body harness with one from a 5.3 truck

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08-26-2018, 04:43 PM

#256

_zebra

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yep, this is for the GMT800 body style.
and sorry i can't help, but i can bump the thread.

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10-02-2018, 02:04 PM

#257

AMS13

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Question for you guys. I have read through the entire thread, and searched but I can find the answer. I have a 04 Silverado with the 4.3. I understand I would need a 03-07 classic 5.3 or 6.0 in order for the swap to work and be as easy as possible, but what about 04 5.3 out of a Express van? The motor is drive by cable, and I know the 03-07 classics are drive by wire.. would I have any trouble using this motor? It is a complete drop out so I would get the pcm and other goodies.

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10-02-2018, 06:09 PM

#258

FFDP

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It should work.

Maybe some minor things here and there but if it's a complete drop out with harness and computer that makes things easier.

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11-22-2018, 02:38 AM

#259

Little_Mata

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Hello I’m pretty new to this thread but I have some questions about a swap I’m trying to do. So my truck is a 2002 v6 Silverado. The engine that Im trying to drop into it is a 5.3 from a 2004 Tahoe. I have the wiring harness, pcm, and fuse block from the Tahoe and my concerns are this: is the harness and pcm going to be compatible for my truck and will it be an easy “plug and play” swap for me? Or will I have to get a harness and pcm from a 99-02 Silverado?