2000 regal radio removal

I've got a 2000 Regal LS. I need to remove thearadio because it has stopped working. I am trying to find a replacement radio/CD/Cassette for this car that will work with the steering wheel controls. All the ones I have found say that I need to look at the plug on the back of the radio to see what color plug I have. My biggest problem is, I don't know how to get to the radio to take it out.