I have a hard plastic vacuum line thats coming out of the main harness on the drivers side of the intake manifold, any body be able to tell me where it goes?

 

The only one that I know of on that side of a 4.3 w motor, would be the one that connects to the bottom of the throttle body. I hope this helps.

 

Actually no thats not it the one i was referring to is a really small line that is in the same loom as all the other wires on the drivers side of the intake mannifold...but i decided to check and see cause i couldnt remember which one went under the TB...and sure enough it was te right one but the one iwas looking for went right next to it. thanks man...the simplist thing on these things.