I am using a Rev Extreme can for blower motors--has two check valves. I mounted it to the drivers side inner fender with a bolt up thru the fender and bent the supplied bracket. The 04 may have something in the way---I don't know. I also use the GM Performance PCV that they use on the new LSA motors. It plugs into the oil fill and drains it back to the motor. I went so far as buying two passenger side valve covers from a 2000 truck motor as they have baffles built in to the valve covers to make up for no PCV.
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