hey guys I have a 2003 duramax. I parked the truck, turned it off fine everything was normal. went to start it and the key spins freely from off to start with no resistance. nothing lights up or anything like it doesn't even acknowledge that the key is in there. its not a dead battery or power problem, that I know for a fact. it has plenty of power. so what can I do to fix this? do I need a new ignition tumbler?