It happened around 6:30 Friday morning as the woman walked along 101st Street between Union and Lowe.
The victim tells police a man driving a gray Buick Century told her to get into the car. He used his car to block her from getting away. She got in and was driven to a nearby alley where she was assaulted.
Police say the suspect's Buick was a four-door and it may have been a 2005 model.
Anyone with information should call Chicago police.
