Oil filter size

no engine size included in question?or if it's a G6 or G6 GTP?if just a G6 4 cylinder 2.4L,then it's a cartridge type filter.if it's a G6 6 cylinder 3.5L then it's a screw on type.if it's a G6 GTP 6 cylinder 3.9L,then it's a screw on type also.you can go to any parts house web-site,and look up parts yourself,or just look in the owners manual,and it will tell you which one you need.from the factory it most likely came with an ac delco filter.