Where is the oil filter located on a 2006 4 cylinder Chevrolet Malibu?

Do you not have an owners manual? It uses a cartridge type oil filter. This is where a reusable housing is used and you only change the paper-filtering medium inside. These are usually sold as GMC oil filter kits where you get the paper filter oil filtering material and the associated rubber O-rings that seal the paper inside the housing. Go buy the filter and it will come with instructions for installation. The filter is located on top of the engine.