Ignition controlled wires

[jack53]

I just purchased a used 2019 Chevy Silverado 3500hd high country. I'm going to use it to pull a 5th wheel camper. I want to wire in an "ez tire"  to keep track of the pressure and temperature of the camper tires. . On my 2008 Silverado, I pulled a fuse from under the hood, don't recall which one off hand, stuck a wire in one side of the fuse as I pushed it back in. The ez-tire worked great and only when the ignition was on. Problem now is, I cannot fine a fuse or wire that is ignition controlled on my 2019. Any ideas or suggestions?