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Old 09-24-2009, 04:25 PM   #1
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1991 S10 Heat/AC Vacuum Problem

While driving sometimes the fan will be blowing and you can hear it but hardly nothing comes out the vents - almost like it is stopped up. Then it will be OK and return to normal.

I figure this is a Vacuum problem. Does anyone know of the best place to start?

All other vacuum opperated systems- 4WD, Cruise all work normal.

1991 4.3L T-10 Blazer 700r4 Trans
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1995 K2500 4x4 5.7L Cheyenne
1991 T-10 Blazer 4.3L Tahoe Package
2000 Ford Taurus - Spouses
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