eddieo818 Posted June 27, 2008 Report Share Posted June 27, 2008 It's located at the rear of the left-side valve cover. GM made an improved one for the LS7, supposed to keep more oil out of the intake but reports of such are spotty. Mr. P. Would this be the same for a 2005 5.3 engine?? Quote Link to comment Share on other sites More sharing options...
delay18 Posted January 28, 2009 Report Share Posted January 28, 2009 So I replaced the pcv valve today. And like Quik said, its not really a valve but a restrictor. I replaced it with a Napa # 2-9399 with is the 03 ZO6 pcv valve. And it is actually a valve with a check ball in it. The opening is much bigger than the stock one AC Delco #CV 2001 C. Honestly, I could tell a difference in how it idled, and how it responded while driving. Maybe, I am crazy, but I could feel a difference. Anyway, someone make a liar out of me and tell me I've lost my mind.' Here is a picture of both. The shiny one is the new one, you will notice a much bigger opening than the stock one. Pardon the glare. Which part number is the Z06 valve? The Napa # or the Delco #? Quote Link to comment Share on other sites More sharing options...
Wizard Posted January 29, 2009 Report Share Posted January 29, 2009 Which part number is the Z06 valve? The Napa # or the Delco #? Read the two posts. the part number is the Napa #. Quote Link to comment Share on other sites More sharing options...
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