well lets see, when on med or low the fan makes a weird noise, sounds like a little piece of paper stuck in the fan, oh and the drivers seat sounds like the walking dead, so we took it in to get it fixed before the warranty ran out... my favorite service person up there just called, they put some anti squeak tap in the dash to fix the noise (?????????!!!!!!!!)in the ac fan, and the parts for the seat wont be in for 2-3 WEEKS!at least they are giving him back in the interim... i absolutely dont like the 08 impala they gave us for a rental... oh well at least she said it dont matter if the mileage runs past the warranty limit since we got it in before hand... thats good. but i tell ya i think the sound they heard was the rear tire holder that is sans the top hat, and not the ac fan... some peoples children...lol