how to remove 2005 chevrolet malibu oem plastic wheel cover 15" To Be Able To Change Tire

You probably need to remove the wheel lug nuts to remove it-

usae a screwdriver or pry bar to pry it off

No It's Not Held By The Lugs Nor Is It Held By The Outer edge Of Rim, Seems To Be Held In The Center Of Cap Someway.

you have to remove the center cap.and its held on with 3 screws at the lug nut area.

The Plastic Lugs Are Fake And Unscrew Then Cap Comes Right Off. Thank You