I just bought a 2007 Grand Prix GT with the base radio in it with XM. It sounds great, but two of the bulbs in the display's backlighting are burned out. I currently have the stereo out, but not unplugged (don't want to get it programmed again). I also have the faceplate released from the stereo, but also not unplugged. I stopped there because I wasn't sure if I unplugged the faceplate if that would require the stereo to be reprogrammed. Now, I'm assuming the bulbs are replaceable. But just need to be sure before I unplug it, or if I should just try to get the circuit board away from the plastic without unplugging it. Thanks.