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Chevy S-10
Chevy Blazer S-10

What is the vacuum routing for 4wd on a 1985 Chevy S-10?


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Wiki User
2005-07-16 21:44:50
2005-07-16 21:44:50

it goes from the intake, splits out of a tee and goes to the HVAC cluster in the vehicle, goes down to the switch on the T case, form there one comes up the firewall to a vent and the other goes to the 4wd servo which is under the battery tray. if when you put it in 4 wheel drive the front end lights up on the panel down at the shifter its either the T case or the front diff and if 4 lo makes it go slow as hell like normal its the front diff

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