clicking noise when open car door sounds like under dash last about 10 seconds dome light seems to be involved car doesn't do when its running and key ndoesnt have to be in ignition

I have an 08 chevy impala too. It did this for a few months. it may be the blend door actuator, its an inexpensive part only about 30 dollars and there are multiple videos on how to fix it. This is the one I learned how to replace it from. https://www.youtube.com/watch?v=ttIZ_iCLFGo it took me about 20-30 minutes to fix. hope this helps :)