The purple hose is the vacuum supply. You should have vaccum available any time the engine is running. There is a vacuum reservoir under the dash as well. Also check the vacuum connections on the intake manifold.
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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