2008 Pontiac Grand Prix Ingition Ring Removal

I want to replace the car stereo in a 2008 Pontiac Grand Prix. In order to do so, I must remove the black plastic ring that surrounds the key ignition switch. This in turn allows me to remove the plastic dash and thus the car stereo. The problem is I don't want to damage the the ignition or the black plastic ring. Does anyone know how to remove this without damaging it? I used a plastic wedge to try to pop it out but it didn't appear to want to go "nicely" and so I stopped and am doing more research. Any help would be greatly appreciated!