I don't know if this was brought up already, but this is probably my number 1 gripe about the car. During my first few days using the car I almost got in two accidents when changing lanes on highways, not seeing the cars around me. After doing some research I found that some suggested adjusting the mirrors more outward. I tried this and still felt there were blind spots. I have driven easy over a million miles in over 45 years of driving (including as a NYC cab driver for a short period) and never had an accident when changing lanes due to visibility.
I think the problem lies in the location of the mirrors. For whatever reason (wind turbulence likely) GM elected to mount the mirrors farther back on the doors. Most cars have the mirrors mounted at the most forward part of the doors. Heck, sports cars used to have them on the front fender, giving an even wider field of view. So, I believe the farther back the mirror is mounted, the field of view lessens.
In my case, I elected to add a convex mirror to each side. This eliminated the problem for me, but as with any convex mirror, you can't judge distance, so you don't know exactly how far from you the other car can be.
I think the problem lies in the location of the mirrors. For whatever reason (wind turbulence likely) GM elected to mount the mirrors farther back on the doors. Most cars have the mirrors mounted at the most forward part of the doors. Heck, sports cars used to have them on the front fender, giving an even wider field of view. So, I believe the farther back the mirror is mounted, the field of view lessens.
In my case, I elected to add a convex mirror to each side. This eliminated the problem for me, but as with any convex mirror, you can't judge distance, so you don't know exactly how far from you the other car can be.