Interior Lights and Door Ajar

I have a 2000 Impala LS, today the door ajar light kept coming on and tonight I noticed my interior lights are staying on. I open the door and the interior lights go out, but a few minutes later the lights come back on. Help!

mmmm you open the door and the lights go out ????? more info please

We're having the same problems with a 2004 impala.
The "message center" says the door is open all the time
the bell dings even going down the highway. The doors lock and
unlock randomly while driving.

Maybe one of the door switches has gone bad?
Or maybe the BCM has lost it's mind?

for shits and grins you can try to clean up the door ajar switches (I'm not sure where they are), otherwise start saving up for a new BCM. it'll cost you around $300 - $400.