OK.. today I went to change oil in the OL's 03 Durango with a 5.9. Opend the hood to find one big ass mouse nest on the intake manifold on the passanger side, SHOP VAAAAAAC,, cool all gone but I found what appeared to be some sort of a vacuum fitting into the side of the manifold. What ever was on it the mice chewed off, theres no hose that I can find, just open fitting. So I am wondering if there was a cap on the fitting and it is for some option that she didn't get,, cant be to freekin many,, But does any one know if that fitting is capped, I cant believe it would be left open?