In case you missed it, Furrion has finally (after a couple years) produced an adapter 7 pin plug so you can use your cameras with 2021+ GMC/Chev tow vehicle power.
Camera System 7-Way Adapter with Power Switch is now available for purchase*. Plug and play solution to ensure that your wireless camera operates trouble free when powered through the 7-way connector on your tow vehicle.
*Limited stock available. In case it runs out of stock before you can buy, you will need to sign up again for in-stock notification