replacing transfer vacuum switch 1995 blazer

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Apr 2, 2013 | 03:50 PM

scphill34

Thread Starter

Beginning Member

Joined: Mar 2013

Posts: 31

replacing transfer vacuum switch 1995 blazer

2D 4.3L 4wd Does it matter which vacuum line is on which connection on the new vacuum switch. I don't see any markings on the new switch.

Apr 2, 2013 | 04:39 PM

okiedoak20

Senior Member

Joined: Dec 2009

Posts: 769

From: Woodbridge, Va

okiedoak20 will become famous soon enough

im pretty sure it does matter, i plated with my Vac. lines until i got the right order

Apr 4, 2013 | 12:54 PM

abig84

BF Veteran

Joined: Aug 2009

Posts: 3,424

From: munster indiana

Year there's two vacuum lines and the 3rd is a vent. If you arejust swapping switches the part that snaps back onto the switch is notched so you can't out it on wrong

Apr 5, 2013 | 09:52 PM

okiedoak20

Senior Member

Joined: Dec 2009

Posts: 769

From: Woodbridge, Va

mine was located on the firewall, two vac hoses comming from it, not sure what years were like that, a buddy of mine has a 1998 Envoy, just like mine, but the vac switch is not on the firewall, it some place else,