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Weird noise when turning on heat/AC?

wamfire20

New Member
Joined
May 12, 2016
Messages
2
I have a 2003 with the 5.3 and 180,000 miles. Whenever I turn on the heat or AC there's a loud vibrating noise that gets "louder" and "faster" depending on the RPMs. Sometimes it lasts for almost a minute and sometimes just a few seconds. Any ideas?
 
I would look at the AC compressor belt or tensioner.
 
If not belt, pulley, tensioner or compressor
Then have the system checked as you could have clogged orifice tube

 
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