01 1500 2WD with 98 model 5.2L engine...

Finally got the new engine put in this weekend. I haven't fired it up yet because I still have a few minor things to get done, but I have a question dealing with the wiring harness...

On the driver side of the harness, I have all the injectors wired, the A/C compressor is wired and all the throttle body plugs are plugged in but I have one gray plug that I cannot find where it goes.

This was the first time I had pulled this engine and I thought I did a really good job of keeping up where everything went, but this alludes me.

The plug is approximately 3/4 of the way back on the driver side. Does any one know where this plug goes? I have checked the knock sensor (at least I think that is what that cylinder shaped doo-hitchie is at the back of the engine next to the distributor cap) and it is plugged up as well.

Any help would be greatly appreciated.

 

Oil Pressure sending unit?

 

make sure everything is plugged into your TB ??

 

OK, I think I made a beginner mistake. That doo-hitchie I referred to as a knock sensor, I believe that is the oil pressure sending switch.

I thought that would be located near the oil filter (as I read that somewhere on line), but as I searched "oil pressure sending unit" on autozone, it shows the exact same cylindrical shaped "doo-hitchie" I was referring to.

I found a picture of the wiring harness in the truck from before I removed everything. If I knew how to post a picture, I would post it..I searched the FAQ area but could not find out how to do it...