2000 s10 trailblazer vacuum line
 

I have two lines that run to the driver side fender just a few inches off the fire wall. I know one of the lines has to be plugged so the 4x4 will work. The second is unhooked and can’t find where it hooks up at.

Have a look at the vacuum accumulator...Its a black plastic ball inside the drivers fender and real hard to see but if you use a mirror or get your head right down there you can see the nipple of it sticking out where a vacuum line would slip on to...I tried to find a picture that I have seen on this site but there is so many vacuum related threads.

i seen that is where the line for the 4x4 line but there is a second line that runs over there with it. I need to know where it goes. I think it might have something to do with my vents not working right. It a short line and has a funny end on it. I am not sure how to load a picture or I could show you.

Thanks I will see if that’s it.

Ive got the engine vacuum and it T's off . 1 goes to the black ball and the other t's off again , 1 going to the 4x4 vacuum switch on the firewall the other connects to a small hard line that disappears and i cant see where it goes.

thanks for help. That line ran to a hard black line that Help control my vent select switch