Plastic on the mirror was big enough to get my fingernails on. Then like Scott said. I pushed pretty firmly, but slowly..that way I felt the silicone (looks like what they used) start to release.

The Regals have heated mirrors, GP's are put together the same though. See the spot on the upper left..that's where the silicone was holding


YOu can see that plastic edge


And why it's all worth it