I agree that the mirror is a little on the large side. But I think you need to adjust your seat/driving style to this car. The way they designed it, the exterior styling took a huge priority over practicality... as it should, it's a muscle car!
Not a bad idea to swing by the dealer to see if you can find a smaller onstar mirror. Im sure some GM cars have smaller mirrors. Let us know what you find out, it may be a common modification if we can find a plug and play replacement straight from GM.
2010 2SS/RS CGM
American Racing Headers, Magnaflow axle back, Roto-Fab CAI, Audio Integrations Sub box, Alpine Type R 10, Alpine MRP-500 amp, Pro Clips iPhone Mount