To setup your Chromecast device to work with Sling TV, follow the steps below.
To start, plug your Chromecast into your TV via an HDMI Port. In order to power your device connect the USB power cable into the back end of your Chromecast. Plug the opposite end into your nearest power source, or into any available USB port on your TV.
Now that your Chromecast device is plugged in to your TV, let's start by downloading the Google Home app to your mobile device or tablet.
Launch the Google Home app on your mobile device or tablet, then select the name of your Chromecast device.
Next, make sure the code on your TV matches the code displayed on your mobile device or tablet.
Now its time to name your Chromecast device.
Make sure your mobile device, or tablet, are connected to the same network as your Chromecast device.
Now that your Chromecast is cast-ready, it is time to download the Sling TV application, to do so click INSTALL. Then create your Sling TV account through your mobile device, or tablet.
Your installation is complete, launch your cast-enabled Sling app on your mobile device or tablet, and cast shows and movies to your TV!