How install DVD update disc in 2005 Lexus GX 470?

To install the DVD update disc in a 2005 Lexus GX 470, start by turning on the vehicle and ensuring the navigation system is powered up. Open the navigation system's disc slot, usually located in the dashboard. Insert the DVD update disc into the slot, making sure it is oriented correctly, then follow any on-screen prompts to complete the installation. Once the update is finished, remove the disc and restart the navigation system to ensure the changes take effect.