As long as it shows the correct amount....I'm happy. Got a loose wire on the patrol somewhere. You can have a full tank , plug the van in, and the needle drops to wherever it feels like. Coming back from Margaret river ( our expanda get together), car alone showed 3/4 of the main tank left. Plugged the van in and it dropped to empty. Drove home the whole way with the light on and showing no fuel. Used the sub tank....just to be sure..
Well it does till the light comes on! The patrols had a dodgey body earth! My mates early GU fuel gauge was always playing up till he re earthed the body.