I was wondering if anyone else is experiencing this problem. At night upon start up off my 07 tahoe the mirror dims automatically. It turns to the greenish/bluish color when it dims. Well this only last for like a minute or so and then this color goes off and the mirror looks like if its not dimming. Then a couple minutes later the mirror turns to that greenish color again, in other words it dims. This is on and off. I was wondering if anyone else is having this issue.