Just installed mine a couple days ago, but I’m hearing hissing from the top pcv on the intake manifold can’t feel any air coming out the hose tho. Did you experience any hissing?
With these years/generation of Vortec engine, they run a mass airflow sensor. Any metered air vented out of the can past the sensor will cause the idle to surge as the MAP sensor in the manifold fights to reconcile the funky inputs from the missing air. Any catch can system on these must be closed.
