LS wiring Harness layout - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WB72 · 08-14-2017, 03:58 PM

I have a 2002 5.3l LM7 truck engine that I am going to install in my 67.

I purchased a bunch of parts, so I don't have the donor truck to reference the layout of the wiring harness. Surprisingly, there isn't a lot of information about this online.

Is there a rough diagram on where the harness lays on the engine?

Where is the PCM located on this?

What position does the harness enter the engine?

Does it wrap around the front, how does it go to the bottom of the oil pan?

If anyone has pics of this in their build thread, let me know where I can look.

08-14-2017, 03:58 PM	#1
WB72 Before and After Join Date: Feb 2000 Location: Leduc, Alberta CANADA Posts: 632	LS wiring Harness layout I have a 2002 5.3l LM7 truck engine that I am going to install in my 67. I purchased a bunch of parts, so I don't have the donor truck to reference the layout of the wiring harness. Surprisingly, there isn't a lot of information about this online. Is there a rough diagram on where the harness lays on the engine? Where is the PCM located on this? What position does the harness enter the engine? Does it wrap around the front, how does it go to the bottom of the oil pan? If anyone has pics of this in their build thread, let me know where I can look. __________________ Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA

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