plug/wire harness

I have replaced my intake gaskets on my 2000 impala 3.4 with 167000 miles in hopes of fixing my problem, However I have 1 plug that i can not find a home for. The plug is located on the passenger side of the engine near the alternator mand coil paks. It is atatched to the left wire of the dual harness that carries most of the sensors. I have atatched the alternator plug and wire, the "big" plug that sits beside the alt, the square plug for the o2 sensor, and the smaller plug that goes into the coilpak. Any ieas where this plug goes? It is a smaller plug with 2 female pins in it. Thanks. :screwy:

Not sure about yours, but I know there are some plugs that are only used on California emissions cars. It may be for that package.