B barkingspider Joined Dec 23, 2013 Messages 2,459 Location socal Oct 14, 2017 #61 Recently replaced the spark plugs on my CTS, had to replace the upper plenum gasket because the old one just about disintegrated. Pulled the pcv valve, drilled the holes a little larger and reinstalled. All good
Recently replaced the spark plugs on my CTS, had to replace the upper plenum gasket because the old one just about disintegrated. Pulled the pcv valve, drilled the holes a little larger and reinstalled. All good