Just got done installing a Jegs oil "catch can" separator on the PCV line on my 2013 Silverado 5.3L. Real easy job that took me all of about 20 minutes. Hopefully will do a great job at keeping the oily junk from going into the intake manifold while still letting the gasses to get thru.
http://www.jegs.com/i/JEGS+Performance+Products/555/52205/10002/-1
http://www.jegs.com/i/JEGS+Performance+Products/555/52205/10002/-1