This GPS map is an essential accessory for your vehicle. It is designed to provide you with the most accurate and up-to-date navigation system available. With this map, you can easily navigate through North America and reach your destination in no time. The software format of this map is an SD card, which makes it easy to install and update. The GM 2021 Navigation System North America GPS Map Auto Vehicle Update 86775531 SD is a perfect choice for anyone looking for a reliable and efficient GPS map. It is compatible with various vehicles and can be used for personal or commercial purposes. This map is an excellent investment for anyone who wants to stay on the road without worrying about getting lost.