What is your question?
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What is your question?
some times black ,blue smoke from tail pipe, oily tail pipe
What makes this problem better or worse?
no idea
How long has your 2002 Cadillac DeVille had this problem?
no idea

1 Reply
it doesn't have a valve,even though parts stores list one,it don't have one. copy and paste the link below,read entire thread. https://www.cadillacforums.com/forums/northstar-engines-system-technical-discussion/15184-pcv-valve-location-2003-deville.html