Harness difference between LY6 and LS3?
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Harness difference between LY6 and LS3? Hey guys,
I will be replacing the current LY6 engine I have swapped into my Cutlass with a LS3 engine. What I am wondering and hoping to get some help with is the harness differences between the truck harness I used and the LS3 harness.
I assume there will be a difference with the cam sensor since the LS3 is not a VVT engine and I also heard something about the MAP sensor as well. I was hoping someone could confirm this point me in the right direction as to what may be the easiest way to go about making this work. Are there any harness adapters for this or possibly have GM part numbers for the connectors?
Thanks in advance,
Calvin
I will be replacing the current LY6 engine I have swapped into my Cutlass with a LS3 engine. What I am wondering and hoping to get some help with is the harness differences between the truck harness I used and the LS3 harness.
I assume there will be a difference with the cam sensor since the LS3 is not a VVT engine and I also heard something about the MAP sensor as well. I was hoping someone could confirm this point me in the right direction as to what may be the easiest way to go about making this work. Are there any harness adapters for this or possibly have GM part numbers for the connectors?
Thanks in advance,
Calvin
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From: Fort Worth, Texas
If the MAP sensor plug is different?......You will need some tuning to run the LS3 MAP sensor.
https://www.summitracing.com/tx/part...rese1-_-holley Sales for about as much as a pigtail.
This will fit the Camshaft Sensor Jumper Harness.....Remember Gen IV's are wired backward from Gen III's.
https://www.summitracing.com/tx/part...1-_-ict-billet
https://www.summitracing.com/tx/part...rese1-_-holley Sales for about as much as a pigtail.
This will fit the Camshaft Sensor Jumper Harness.....Remember Gen IV's are wired backward from Gen III's.
https://www.summitracing.com/tx/part...1-_-ict-billet
Thread Starter
Teching In
Joined: Oct 2016
Posts: 23
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From: Ottawa, Ont. Canada
If the MAP sensor plug is different?......You will need some tuning to run the LS3 MAP sensor.
https://www.summitracing.com/tx/part...rese1-_-holley Sales for about as much as a pigtail.
This will fit the Camshaft Sensor Jumper Harness.....Remember Gen IV's are wired backward from Gen III's.
https://www.summitracing.com/tx/part...1-_-ict-billet
https://www.summitracing.com/tx/part...rese1-_-holley Sales for about as much as a pigtail.
This will fit the Camshaft Sensor Jumper Harness.....Remember Gen IV's are wired backward from Gen III's.
https://www.summitracing.com/tx/part...1-_-ict-billet
The LY6 engine and harness I have is a Gen IV engine. I will be changing the tune to a LS3 tune instead of the LY6 tune that I currently have.
From what I can tell the Camshaft Position Sensor connectors for both engines are ACDELCO Part# PT2785 so I'm assuming that connector wont be an issue which I am a bit surprised about, maybe someone can confirm this for me in case I am incorrect. The MAP sensors are different along with the connections so my plan is to purchase a new connector pigtail and wire that in to my harness. As far as I can tell all the other connections seem the same but was hoping someone else may be able to confirm this.
Thread Starter
Teching In
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Do you happen to know if those 3 wires are pins 44 (A), 66 (B), and 64 (C) from the ECM? If so I gather pins 16 and 52 are the extra wires that wouldn't be used for the 3 pin connector.
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From: Fort Worth, Texas
O kk so I'm assuming I will have to buy that connection as well. The 5 pin is probably for the L99 I'm assuming.
Do you happen to know if those 3 wires are pins 44 (A), 66 (B), and 64 (C) from the ECM? If so I gather pins 16 and 52 are the extra wires that wouldn't be used for the 3 pin connector.
Do you happen to know if those 3 wires are pins 44 (A), 66 (B), and 64 (C) from the ECM? If so I gather pins 16 and 52 are the extra wires that wouldn't be used for the 3 pin connector.
Thread Starter
Teching In
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From: Ottawa, Ont. Canada
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Teching In
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From: Ottawa, Ont. Canada
Thanks for the help Clinebarger!
For future reference if anyone else wants to do a similar swap. The CAM sensor, the MAP sensor and the Oil Pressure sensors are different between the harnesses.
For future reference if anyone else wants to do a similar swap. The CAM sensor, the MAP sensor and the Oil Pressure sensors are different between the harnesses.