Hello all,

First off, I know that vacuum problems have been beat but I can simply not find a diagram that shows every vacuum line under the hood and where it connects.

I recently purchased a 2001 Blazer ZR2 with 114000 miles on the clock. I just finished up a Transfer case input shaft seal and intake manifold gasket replacement. While I had the motor apart for the intake I took the liberty of attempting to blow out the ATF fluid out of the vacuum lines. The problem is I have a vacuum mystery hose that is running down to the secondary air pump that I have no clue where the other end is supposed to go. It blew off of somewhere when I was blowing out the lines with low pressure. Can someone please help with a detailed vacuum diagram from a FSM or tell me where this thing goes? Thanks in Advance.

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Big Port on the end of the line goes to the PCV fitting on he manifold, as a source of vacuum. Smaller port supplies vacuum to the HVAC feed in the last photo

 

Thankyou! That was the correct routing and it resolved my vacuum leak issues.

 

You are welcome