Either it sounds like a slack or broken belt or one of the pulleys is locked up.
Off the top of my head, my best guess would either be the A/C compressor or its pulley.
Does it do this with the A/C completely off and the heat settings completely off?
I have a few links from our "Repair Guides" (top right of our pages) that might be helpful for your repair. These all pertain to the serpentine belt.
Serpentine Belt
Serpentine Belt - Timing Belt - Timing Chain Diagrams
Serpentine Belt Replacement
Serpentine Belt Tension-er
Serpentine Belt Tension-er Replacement
Keep us posted on your findings.
The Medic
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Sunday, September 23rd, 2018 AT 11:52 AM