I just replaced my intake manifold gasket and I have one electrical connector the I can't find where it needs to be plugged in near the A/C compressor. Can someone please help me out so I can button this project up. Attached are some pictures.

Thanks
Aaron

 

There is a high-pressure side valve to the A/C on an R-4 compressor but that doesn't look like the ones I know of. Might br the low-side A/C system plug, usually in--line,

 

That plug is so dirty I question if it was ever plugged in - maybe for something not included on your vehicle?

 

True. And most Harrison R-4 A/C compressors came with a plugged off high-side pressure switch, not a sensor..

 

might be the smog pump plug. it does look like it was never used, gm would use a generic wiring harness and only use plugs *** needed by the application