Where to get advice about your car’s problem?

My “2003 Saturn vue 4cyl” car is having an AC related problem and it just stopped blowing enough AC. Can you please tell me if AutoZone or O'Reilly stores will give free advice about which part that need to be replaced? Is there any major auto part selling stores in USA that will give free advice about which... show more My “2003 Saturn vue 4cyl” car is having an AC related problem and it just stopped blowing enough AC. Can you please tell me if AutoZone or O'Reilly stores will give free advice about which part that need to be replaced? Is there any major auto part selling stores in USA that will give free advice about which parts I should buy from them to fix a issue in a car?
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