Investigators say on February 25, the man got out of a dark brown pickup truck and tried to grab the girl, but she was able to run away. A day earlier, police say, the same man approached and told the girl he knew her mother.
Both incidents occurred at 2:15 p.m. after the victim was dismissed from school.
The man is described as a 32-year-old Hispanic, 5'8", 170 lbs., with short black hair and a beard. The brown pickup also featured a yellow pine tree air freshener and baby shoe on the rear-view mirror and a multi-colored "S-O-X" sticker on the driver's side rear pillar.
Anyone with information on the suspect should call Chicago police.