Question about 2001 GMC Safari
See if it has a cabin filter its like an air filter it may be clogged or the vent tube to the front vents are clogged.
Posted on Jul 29, 2009
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Posted on Jan 02, 2017
The problem is that the plastic lines that the air flows through get frail and cracks and breaks.What happens is when the hose breaks you loose vacuum and the system reverts to defrost mode.You should be able to see it from under the hood on the passengers side.You will have to find the area that is broken and then go to the parts store and get some rubber hose that will fit over the plastic hose.Take a piece of the plastic hose with you so you can get the right size hose to fit over it.This just happened to my 97 Astro van.I found the broken hose and repaired it with the rubber line and is working normal now.Hope this helps.Let me know what you find out.Good luck.
Posted on Jul 20, 2010
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