im new to the Gbody game I had a issue with the heat not working in my car. I've changed the heater core and removed the heater valve so coolant is flowing constantly. I still do not have heat and can't figure out the problem. I've even driven for over 30 min got out popped the hood to see if the theater core was heating up and it's cold as ice. My fan blower works also someone please help me figure this out!!