2001 Chevy Astro Vaccumn control

2001 CHEVROLET ASTRO
80,000 MILES • 6 CYL • 2WD • AUTOMATIC
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HANDY_BOB
  • MEMBER
  • 1 POST
Where do the heater/AC damper doors get their vaccumn for operation? As I select various control positions I do not see the diaphrams moving. The AC works fine. The rear AC works fine.The front damper doors stopped working yesterday.
Aug 5, 2008 at 2:22 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
The vacuum source should be the engine, look under the hood, find vacuum line going to firewall, backtrack line to connector, check for vacuum.
Aug 5, 2008 at 6:25 AM
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