Ok. First off this is my girlfriends car. Its an 08 base model ls with a 2.2 liter ecotec. It has about 80k miles on it. I noticed it seemed low on power so I figured I would change the fuel filter, air flter and change the plugs. Well when I checked the air filter I figured I would look at the throttle body to see how gunked up it was. Sure enough it was gunked up. I also noticed it did not look like it was closed all the way so I tried to push it closed more. Sure enough it moved about a quarter of an inch till it was fully closed. I haent touched it yet due to horror stories about reflashing pcm and stuff cause I'm leaving for a vacation in that car here soon. My question is does it need to be replaced or just cleaned out and relearned where it needs to be for fully closed?? I ve searched everywhere and couldn't find a clear answer on my question. Also the car was off when I notcied that it wasn't closed fully.