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Generation IV Internal Engine
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Old 06-05-2011, 04:25 PM   #1
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Default Project at a Stand-still...In need of LS3 Wiring Diagram

I have a L76 crate with an LS3 top end (and a mild cam) that is going into a 69 firebird. I can't seem to procure a wiring diagram from the guy who I purchased the parts from.

Can someone help me out by providing this diagram? I pulled the following information off of the ECU.


On the ECU, it says:

GM Racing
GM# 19258268
Gr. 3.670
GM Performance Parts LS376

It's wired to mate to a T-56 Transmission

With the harness is a pretty hefty fuse box. I couldn't find any telling ID numbers on the fuse box. It has four relays, a couple of 50 amp fuses, a couple of (i think) 30 amp fuses, and a bunch of ancillary fuses.

After being left out in the sun for a few hours, it appears the paper inside the fuse box has faded, rendering it un-readable. Does anyone have a photo of this?

Click the image to open in full size.

Full res photo:
http://farm4.static.flickr.com/3222/...0b288052_o.jpg
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Old 06-05-2011, 04:25 PM
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Pontiac Firebird




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19258268, box, camaro, crate, diagram, diagrams, engine, fuse, gm, harness, instructions, ls3, stand, wireing, wiring


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