Vaccum line routing from transfer case switch?

Discussion in 'Chevy S10 Forum (GMC Sonoma)' started by mike 96 ws6, Jan 30, 2012.

  1. mike 96 ws6

    mike 96 ws6 New Member

    I'm trying to sort out some burnt / mis-routed vaccum lines on my 03 ZR2. Why does the tranfer case vaccum switch have a 3 line connector. I would think that 1 goes to energize the front axle actuator under the battery - and 1 goes to vaccum source (T off EGR valve on my truck). Where does the 3rd line go?

    Also, does someone have a link to a good vaccum diagram for this circuit. I have a Haynes manual and Alldata subscription but neither is much help.


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