It is a plug right by the washer fluid box. It has a very long cord and I have no idea where it goes..if you look at your truck it is connected right under the washer fluid box to a large group of wires. And looks like it runs either upwards or towards the front somewhere Pics included

 

Look around and see what's unplugged it will only go in one spot and you can't find it get another pair of eyes and usually they can!

 

Yeah I've tried that. Can't see an empty one anywhere.

 

Might it go to the MAF sensor or something that is/was removed from the truck. It looks like you have some of the airbox out.

 

Yeah I did the tymar intake. But the plug that came out of the air box I have taped off so I have no idea where this one could go..I've looked for hours and just can't find anywhere for it.

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That's actually what it was. I feel like an idiot. I taped the one from the airbox up but not the one from the actual piece. Thanks.