EGR valve ??? two wire or three wire? CONFUSED

[Alaskaburb]

I have a 1993 K2500 suburban 4x4 base. All of the diagrams I find show an EGR solenoid with a two wire connection and mine has a three wire solenoid. I ordered a harness for a three wire heated O2 sensor with a great design that Ts into the EGR harness since it is fused and ignition switched. Great idea! My harness arrived and I raced out to get it installed and my EGR solenoid has a three wire plug going to it. I assumed the new harness was wrong but it appears after some research that most EGR connections are 2 wire.

What the heck do I have going on here?

Any help would be greatly appreciated!!

 

[Alaskaburb]

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So here is what I have. Apparently this is the EGR solenoid most commonly found on 454 and 4.3 engines. I am not sure why it found a home on my 5.7 though.

The eBay seller ctmss4284 makes very clean high quality electrical parts for our vehicles. He called me directly to work through this and is making up what I need custom.

 

[madisenchevelle]

I have the same issue so what did he make up for you?