2002 Saturn L100 License Plate light not working

There are 2 screw on each lens that you can remove and then pull the lens down to access the bulbs. Also sometime the wiring harness breaks in the trunk where it goes from the body to the trunk lid. Give that a try.

Thanks a lot. I finally pulled out the license plate bulb after prying left right and removing covered from outside. But I found both of bulbs are ok and not burnt out. However the wire harness inside truck also looks intact. I will check once again meantime any other suggestion otherwise I have no option to take it to some workshop. Thanks again for your help.

There is a connector in the trunk, on the drivers side, near where the trunk hinge is attached to the body, sometimes the wires break out of the connector. Check that out and let me know what you find.