on mine there are 3 vacuum lines going to the dash heater air conditioner controls. one is black, one is blue and one is red. the blue and red run from the contol to the plenum in the right front bay in front of the passenger tire where the blower for the genny is. the black one will be a short line that is the source for the vacuum controls on the dash panel and will run from it to the vacuum tank which is a black plastic ball about 6-8 inches in diameter. it is buried in the center of my dash behind the center console. then there will be a larger vacuum line that goes from that ball tank to the vacuum pump. it will be a regular vacuum rubber hose like in cars. the other 3 attached to the controls are much smaller.
tom
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