2009 Chevy Malibu in-cabin air filter?

Acoording to GM Service Manual, there isn't one on a 2009 Malibu at all. Most cars & trucks they have stop adding those to cars usually in order to cut cost of the automobile while still raising the price of the vehicle

2010 Malibu Cabin Air Filter Location

Replacing your car's air cabin filter is a relatively simple repair that can be done in a few minutes with minor tools in most cases. Always wear protective gloves and eyewear before you begin servicing your car. To replace the cabin filter, first locate the air cabin filter housing; it is usually under the dash on the passenger side or under the hood near the rear of the cowl. Air cabin filters are similar to air filters but cabin filters have better filtering qualities. To determine if your cabin filter needs to be changed, remove the filter housing retainer clips or screws and remove the filter, gently tap the filter, if you see dust falling from the air cleaner it is filled to capacity and needs to be replaced.

http://www.2carpros.com/how_to/change_cabin_filter...