Engine harness swap

Good afternoon,

They look like the same mountings.

I attached pictures of the two. Tell me which one you have on the truck.

It looks like you are good to replace with the one that connects to your harness.

Roy

https://www.2carpros.com/images/question_images/431039/original.jpg

https://www.2carpros.com/images/question_images/431040/original.jpg

The first picture is the one with one plug that’s from 2004 engine harness.

The second picture is what’s on my truck now it has two plugs for neutral safety switch.

Please let me know and thanks a million. I just don’t want to waste my money and time if it doesn’t work. My ECU is programmed to my VIN not sure if computer recognized it looks like they just combined the two plugs to one on 2004.

Those are the exact images I already posted for you.

Yes, it will work.

Roy

So, if I get the neutral safety switch for the 2004 with one plug and install in place of the two-plug switch on mine it should work?

That is correct. As I stated it will work.

Roy

Thanks bud.

You are welcome.

always glad to help.

Roy

I have a 2003 Chevy Silverado 1500. I’m changing out my engine harness. I have removed and now labeling the plugs and wires on the replacement before I install. I have labeled every plug except one. It’s a 2 pin black with blue cap it’s about 12 inches down from the oil pressure sensor, cam sensor and ground wire the goes in back of engine up top. See picture

I have a 2003 Chevy Silverado 1500. I’m changing out my engine harness. I have removed and now labeling the plugs and wires on the replacement before I install. I have labeled every plug except one. It’s a 2-pin black with blue cap it’s about 12 inches down from the oil pressure sensor, cam sensor and ground wire the goes in back of engine up top. See picture.

The harness came from 2003 Chevy Silverado 1500
SLT 5.3 4x4. It seems my old harness didn’t have this plug but not sure. I’ve looked at some diagrams where cam sensor and oil pressure sensors and don’t see any other sensor this plug would plug into

Hello is this the Extra Cab model and what are the wire colors on the 2 pin connector?
Also this is just a gas model, not gas/ethanol?

From what I can see in the picture, it looks like it might be the knock sensor plug, which is under the intake manifold, unless youve already plug that one in.. Dark Blue and Light Blue wires..

My truck is gas extended cab. My knock sensor plug is on driver side I’ve confirmed that. The plug in question It’s 2 wire. I saw online it was a knock sensor plug. On my truck the knock sensor plug is a bigger plug on driver side.

I know my knock sensor is plugged up could that just be for a different application or is there a knock sensor plug on both sides of intake

This is where my knock sensor plug is located

I only see one in the wiring diagrams, but some models do have 2 of them, so it could be that the harness you bought has plugs for both. Are the wire colors for the one you have plugged in the same colors? What are the colors on that plug with the blue clip? If its Dark blue and Light Blue wiring, thats the only sensor I see with those colorings.

Hey thanks for the help you where right light blue dark blue is knock sensor that is the correct plug had it mixed up with another plug.

Thanks a million

awesome, so glad you found the right one, you might have been chasing a check engine light issue for awhile with that one. Happy to help..Have a great day,,