Will it cause any sort of damage to the turbo?

I've never tried that so, I don't know the answer.
But, here's a question to ask yourself that may help you make a decision.

What happens when a flammable substance is aerated, compressed, and exposed to a heat source like the compressor turbine and housing?

 

Hey JLL,
May be I should have framed my question differently and just asked "How to clean dirt and grime accumulated in the intake manifold" without mentioning Seafoam.
Cheers

 

First of all why do you think it is stuck closed?

I would go with the PCV fix kit. No longer need to worry about that orange nipple.

 

Www.cruzekits.com

 

To replace these PVCs they are built into the valve cover which is on the top of the engine they attend to crack Crank the car up and see if there's any air being sucked in. If you feel any air being sucked in it's bad and they cost about $100 from GM in the aftermarket ones are about 70 to $80. I recommend the GM one so you know you don't have any more issues. That's a big problem with these cars. Is the valve covers end up having PCV valve issues? Do not clean it. Do not put seafoam in it cuz it's impossible. Your best best spending $100 to save all your problems. Mine on my car went bad at $129K miles

 

those are our old school methods ..............id be wary of seafoam or any solvents and chemicals as it may or may not be compatible with current sensors.

 

You must replace the whole entire valve cover with new gasket to replace the PCV valve which they are in graded into the valve cover. They are $100 at GM which is recommended. The aftermarkets are 70 to $80. I would recommend the GM brand because they're heavier. They're more durable and they have better bolts. They don't strip and they don't warp out