If you haven't done so yet, here's how to add your C4 to the Registry:
1. Go to "My C4 Registration" from the "Account" menu. (Here's a direct link: https://www.c4vetteregistry.com/registry_entry.asp)
2. On the "Vette Info" line select "Add New..." from the drop down menu.
3. The page should reload, then on the "Model Year" line select your model year.
4. Go line by line, in order, filling in as much info as you know about your Vette.
5. On the Photo lines click the Upload links and follow the instructions to upload a pic and add them to your Registration.
6. In the options section, select and option that applies to your Vette and click "Add option". Repeat this for all applicable options.
7. Select your privacy options.
8. MAKE SURE to click the "27) Submit Vette" button at the bottom of the page.
If everything is filled in correctly, it should say that it was added. If not, it should tell you why and you should be able to correct the problem then SUBMIT VETTE again.