Sunfire '04 radio don't want to turn off?!?!?!
 

Recently I noticed that the radio in my Sunfire 2004 is taking long to turn off when my keys are out. The light was fading away about 60 seconds after I was out of the car, but now even when there is no lights in my car the radio still on but turn off after a while. Is there is any way to make that automaticaly turn off as soon as I get my key out of the ingnition?