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Old 01-23-2022, 12:28 PM   #1
suburban99
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4.8 swap into a 1950 GMC

Hey all.
This is my third swap so I am by no means an expert, but i have a basic understanding of how the wiring should go. Bought a 4.8, 4l60E from a guy who was moving..Usually I buy the whole truck and remove engine/harness myself.
Anyway the harness was in a bucket, I got all the bits (tac/pedal/ecm etc).
I need a picture of the location of the plugs/sensors and the wire colors if possible. I could wire by wire off the pcm but trying to save time. If anyone has one it would help. I have already removed what I don't need from the harness..Thanks
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1962 C10 Longbox LS 5.3 4L60E----Sold$$
2014 Ram 4x4 3500 Laramie Diesel..Momma's truck
2015 Ram 4x4 1500
1997 Boxster.
1972 K10 Custom Deluxe LS 6.0
1950 GMC 3100 S10 & LS swapped
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Old 01-23-2022, 01:28 PM   #2
suburban99
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Re: 4.8 swap into a 1950 GMC

I think I have it mostly figured out except this one plug. 16 pins
1 wire goes to alternator
4 wires go to 2 pin plugs that I have no idea what for.
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1962 C10 Longbox LS 5.3 4L60E----Sold$$
2014 Ram 4x4 3500 Laramie Diesel..Momma's truck
2015 Ram 4x4 1500
1997 Boxster.
1972 K10 Custom Deluxe LS 6.0
1950 GMC 3100 S10 & LS swapped
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Old 01-24-2022, 04:31 PM   #3
jweb
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Re: 4.8 swap into a 1950 GMC

Should be able to find what you need here
https://lt1swap.com/2000harness.htm
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Old 01-24-2022, 04:55 PM   #4
suburban99
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Re: 4.8 swap into a 1950 GMC

Quote:
Originally Posted by jweb View Post
Should be able to find what you need here
https://lt1swap.com/2000harness.htm
Yeah Jweb, I used lt1swap as my primary resource for the other 2 I did. I guess I just cut that plug off..(according to Lt1swap)..this one is DBW others have been DBC and I don't remember that plug.
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1962 C10 Longbox LS 5.3 4L60E----Sold$$
2014 Ram 4x4 3500 Laramie Diesel..Momma's truck
2015 Ram 4x4 1500
1997 Boxster.
1972 K10 Custom Deluxe LS 6.0
1950 GMC 3100 S10 & LS swapped
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Old 01-24-2022, 07:32 PM   #5
rodstored-72
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Re: 4.8 swap into a 1950 GMC

i have a stock 4.8 2013 engine with uncut harness i will see if i can find the plug & tell what it is too.. i THINK it is for the data & "periphreals"... not sure though.
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