2001 Chevy Astro Radio and Lights

I have a 2001 Chevy Astro. The radio used to stay on for several minutes after turning off the ignition or until the door was opened. Then suddenly, it just stopped and it now turns off when the ignition is turned off. Also, about the same time, my interior lights started acting up. The lights don't come on when I open the door. I've tried resetting it by pressing the buttons as described in my owner's manual, but it doesn't work. Anyone know what's going on?

Also, the vents don't work except for the defrost ones by the windshield, but I think that's the vacuum line.