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 9:22 AM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
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 1:25 PM
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