Hi all,
New here and have a question that I'm hoping some one can answer. My son has a 2000 Chevy Blazer 4dr auto,4x4 with a 4.3 (vortex) we had a Intake manifold leak (surprise) "we" pulled manifold of and changed gaskets let it sit over night for silicone to cure (why take a chance) We connected what we thought was all plug in's (Electrical) But we have one plug and can't seem to find out were it goes. I checked the Haynes Repair manual but I'm really not to good at diagrams. I added a couple of photo's hoping someone will go hey it goes here. Just don't want to ripped down top end again.

Thanks for any and all input!!
Scott

 

That looks like the plug that connects to the air intake tube...

 

No both plugs are in the air tube 1 in the tube itself and 1 in the mass air flow senor.
Thanks though!