trouble with air direction in heater/air vents

1996 GMC
36,000 MILES
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ROCKS
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Have an RV, GMC Europa, w/350 Chevy engine. Air direction control in dash is not working. It's stuck on defrost. Have checked all the vacuum hoses, and no breaks. Fan and temp controls are working fine.
Jul 24, 2012 at 7:23 PM
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