I have a couple questions to ask, exactly what all does the Body Control Module (truck body controller) do? I have an 04 LS TB 4wd and it has had a parasitic power drain ( .26 amps )for a while now. The reason im asking is, Im thinking of putting a switch on its power source for now until I can get it replaced. If i disconnect the wire from the front fusebox to the rear and pull the 10 amp fuse ( in the front fusebox) to the BCM the drain stops. I could wire a relay in line but im not sure how much amperage the main line to the rear fusebox actually carries. If I did cut power to the BCM overnight would it hurt anything? It has a 3 month old battery in it but I know this drain will eventually ruin it. As long as it doesn't sit for more than a couple days it will start ok. If I looked it up correctly a new BCM was about $100.00 at GM parts direct. Plus I think it has to be flashed (which also worries me) Thanks in advance, sorry for the stupid questions.