03blackbeauty, I'm indeed happy to provide you with your Impala's full build code list. So, please feel free to send me a private message anytime with the last eight of your VIN, and I can look that information up for you.
04': On the spair tire cover panel you will find the RPO label. On the bottom of the label you will find the paint code. It will look like 22L 22U. This tells you the upper and lower color is the same.