It happened just before midnight on the 4300 block of Hemingway drive in Kalamazoo.
Police say the suspect showed his gun, demanded the driver's cash and then took off. A canine was brought in but was unable to locate the suspect.
He is being described as a white male around 6 foot tall wearing a beige overalls, a dark hooded sweatshirt and a green hat.
If you have any information to call police.