How to see if PCV needs replacement

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Metal Flake

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I have a 2016 4 cylinder Equinox with 105,000 miles on it.

How can I tell if the PCV valve needs servicing?

It’s never used any oil until I recently noticed it’s down slightly from an oil change at 102,000. I opened the oil fill cap and there is some air pressure escaping from the fill hole. Is that normal or is it a PCV issue? The car is in super mint condition and I’m hoping this is not a sign of engine failure as I want to keep the car for awhile longer.
 

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