interior lights stay on

I have a 2003 impala. All the interor lights stay on even after I shut all the doors and lock them. I have no idea what the problem is. I have read the book. checked the fuse. got to the settings in the radio. Nothing seems to wrong there. If anyone can help me it would be great.
Thanks

I Assume You Checked The Dash Lite Dimmer Switch Is Not In The Up Position

yeah I checked out the swith and everything it must just be a electrical problem.

yeah I checked out the swith and everything it must just be a electrical problem.

The interior courtesy lighting is controlled by the body control module (BCM) to include fade out and turn off functions, etc.

thanks I will try that and see what I can do.