did you notice any performance from doing this?

Quote Originally Posted by LS1GMCTruck View Post
I deleted it from my tune & simply put a vent breather on the end of the small vent cannister hose, back by the tank. Works good. A vacuum can't be created at the tank because the tank is vented via your vented gas cap. The gas caps allow air into the tank, but not out. I researched this, as I questioned it as well. Take your gas cap off & blow on it & you will see what I am saying.