I have an 09 gt that has a problem nobody can fix. When the car sits for more than 4 days the battery goes dead. I had one dealer tell me the shaker radio was no good which he said is common. I replaced it and 4 days later after sitting the battery was dead. Another said they fixed it and it was a problem with a switch under the hood. I've noticed every once in awhile when i take the key out of the ignition it dings as if the door was open and the key was still in the ignition. I mentioned this and the mechanic said the ignition was fine. anyone else have this problem?