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Check vacuum hose that runs from side of manifold to A/C vacuum ball located (on 97 model) on frame under alternator. Line runs from same ball to a/c controls at dash. Hose crimped, disconnected or broken. Common to trap it installing dog house. Tom

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14y ago
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Q: 1998 Chevy Astro van has air slightly coming out the top vent and sides but not through front vents. How can I fix it?
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