- 1). Order the latest Cadillac navigation system update disc. You can purchase the disc from a Cadillac dealer or from GM's online navigation update website. Find a link in Resources.
- 2). Make sure you have time to update the navigation system. The update takes about three hours. The engine must be running, so make sure you have enough fuel.
- 3). Start the engine and power on the navigation system. Press the "Load" button to open the screen, exposing the disc slot. Insert the disc into the slot with the label up.
- 4). Wait for the disc to load, and then press the "Update" button when it appears on the screen.
- 5). Enter the authentication code that came with your navigation update disc. Press "Enter" to begin the update process.
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