Quote Originally Posted by HighOctaneRacing View Post
No it's not "cause GM". Many manufacturers use PCV valves. It's your responsibility to maintain your car properly. Just take it out and check it once a year.

Also I've used 4 different brands of PCV valves and the only one that has worked flawlessly is AC Delco.

Sent from my LG G3
He asked why the PCV puts oil in the LIM.