Need to find a live wire under dash of Chev class C

99% of the backup cameras I install on work trucks (everything from 3/4 ton vans to class 8 big rigs) are systems which only require a few amps to operate. Tapping into an extra ignition switched circuit in the fuse block is great when it's easily accessible, but if that it not convenient, then piggy-backing the camera off the cigarette lighter or the radio can work fine - just make sure you use the inline fuse provided with the camera system.