I already placed a preorder and paid the $1,000, but the configurator still shows $1,000 is due. Do I need to place an additional deposit?

No, if you already paid the $1,000 fully refundable preorder fee you do not need to pay anything else to configure. Sign in to your Rivian Account to automatically apply your preorder fee to your configuration. You can also sign in directly on the configurator in the upper right-hand corner. If you haven't created a Rivian Account, you can do that from the sign in page too.