CC,HVAC,BLOWER,& DIC Problems

Hello, I have a 2003 Impala. Sometimes my cruise control,ac & blower, driver information center don't work. It's a intermitten problem.Are these connected together on a control module or separate systems? Anyway can someone tell me what the problem is? Thanks

You have a bad ignition switch. Very common issue on these cars. The contacts get weak and start arching, causing many electrical gremlins, including everything you mentioned.