Hello everyone.. Can someone please help me. I am getting a little bit of oil in my air box at throttle body from the ventilation on top of the valve cover on my 05 trailblazer with the 4.2 il 6. What I understand is that is only an air vent that the 4.2 has no pcv valve.. Can that solenoid that sits just below the ventilation to air box is bad. Can someone please help.

Thanks
Mark