Last one to post in this thread wins!

My 2009 GMC as I said before has been having issues with puffing out a bit of smoke at cold startups and the starter motor sounds like it's been dragging on start up.
Well so far it's the PCV valve in the valve cover causing the smoke that is part of the valve cover. So new Valve cover and new starter I will replace tomorrow.
A brake Kleen spray job wouldn’t free it up. Blue smoke? Hate to even think it but valve seals?