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				 A/C Not blowing cold 
 
			
			My wife has a 2003 Chevy Tahoe with about 85,000 miles on it.  The a/c does not blow cold while idling at red lights, etc.  Also, it is taking a long time to cool off once she starts to roll.  Any ideas so I know what to look for when I bring it to a mechanic?
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