Price CHOKE!This company has an adapter that will allow you to display a video source on the center stack screen. Pricey, but nice integration. I would call them to make sure it will work for you before purchasing.
There have been many threads on this. I started one recently after my backup camera module was replaced. Like others, I thought my White Diamond Tricoat was causing the problem. It wasn't. The replaced camera module is now much brighter in the day and actually useful at night. Even when the sun is shining directly on the back of the car I now get a bright picture of what's behind me. Could the image be sharper? Yes, but I'm not taking wedding photographs, I just want to see what's behind me and the improved camera module does just that. Prospective Volt owners need to understand the rear view is considerably restricted, especially if you're not tall. I expect rear-view cameras to be required on all U.S. sold cars by 2016, perhaps sooner.Before you go to the trouble of adding the factory backup camera... Please be aware that they don't work very well. The picture is poor quality. If you have a light paint color the sun reflects off the rear bumper and causes the camera to get very dark. Too dark to see anything clearly.
I also purchased the Auto Spa camera upon reading the post above. Still waiting for the camera to arrive, but I have had my radio reprogrammed in prep for the installation, which I will do myself using the video on the Auto Spa site. They show an installation in a 2013 Volt.
Auto Spa also emails you the dealer instructions for the radio reprogramming. Prominent in those instructions is a request for the dealer to call them so their programmer can make sure the dealer is doing it right. Auto Spa requests your VIN number and the date/time of your dealer appointment in advance so they can have someone prepared to field the dealer phone call. They are available for these calls 9-5, M-F, Mountain Time.
I provided Auto Spa with the info and made an early morning appointment at my dealer. Almost exactly an hour later, my radio had been reprogrammed. I now get a mostly black screen and a "check surroundings" message when I place the car in reverse. Dealer charged me $125.
I may mount the camera in a different location than the stock camera, which reportedly suffers from the distraction of license plate illumination at night. Will check this out a bit before mounting. Will update when the installation is complete.