I have a 07 sierra SLT crew cab with the Bose sound and Multi disk player. I have owned the truck for 4 years now and the Cd player will stay on or try to change disk when truck is off (even stopped using cd and had same problem) It has ran my battery completely down at lest 5 times. I even bought a new Optima battery and it even killed it. I took it to gm and they said nothing was pulling a current but it was most likely the cd player. Anyone know of a fix?