This took a bit of cross referencing... Dorman claims they do not have a replacement centercap for the stock 2014 (any?) Volt. With a little cross referencing of my own I came up with a set that on paper matched, and now that I have them, they are a near 100% match (a slight difference in face thickness). Step #1 in deleting Chevy logos complete
The Dorman center cap does stick out about a millimeter, or about a 1/32nd of an inch.