Looking for vacuum hose routing for 2000 Blazer

MADMAN

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#1
Make
Chevrolet
Model
Blazer 4dr. 4wd
Year
2000
Miles
163000
Engine
4.3
Can anyone help with diagram of those routing? Or be able to tell me what the electrical / vacuum device is mounted on firewall, I followed line to a tee off near left don't fender from there it he's again and one line goes under and to no idea ( do yo) and one seems to just go into some type of plastic cover on backside of fender, above fenderwell? And have no idea what there either? Hoping for help for to replace the hoses but no idea where the go? thanks
 
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#6
Did you "click on the link" that I put in my previous reply? The harness goes four places...how many of those places can you determine?
 

MADMAN

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#9
Mine seems to go a little different, but the line going to transfer case vacuum switch in picture, would that be a electrical switch?