Yes, it's very easy. There is a screw on the front of the plastic cover (signal light cover). Unscrew it and pull out the plastic cover from the bumper. There will be two harness wires going into the back of the cover. The wire on the outside is connected to the marker light. The inside wire is connected to the signal light. Simply grab the plastic end connected to the outside wire and twist and pull it from the cover. This will expose the wire and bulb. To remove the bulb just grab it and pull. Install is just the reverse.
You're lucky all you have to do is replace the bulb. Somehow mine got water inside the cover and caused a short circuit. I have to replace the wire connectors that hold the bulbs on both wires now.