Most cars have a feature where you can turn the key backwards to turn the car off but keep the radio playing. I've been trying to do this for the longest with my GP. I had a Monte Carlo a while back where I could do this with no effort but this car...just doesn't seem to want to do it. I can only turn the key back far enough to take the key out the ignition which keeps the radio playing for a about 10 minutes before it shuts off.
I tried different things like pressing the brakes while turning the key back. Worked once but afterwards never worked again. I can't think of anything else I can do. Maybe the ignitions just messed up...