Help no heat at all front or back ive flushed heater core worked for lil while no none at all no heat in front and back wont even run at all nothing but cold air i can hear blend door move when turn the **** from hot to cold

 

Welcome to chevy; please post year/model/motor etc

 

Welcome from Florida. Just because you hear the blend door move, doesn't mean that it is actually moving. The heater core could still be clogged as your flushing may have partially cleared it, but it clogged again. How did you flush the heater core? The best way is to disconnect the heat hoses and back flush it. That worked for me.

 

Do the heater hoses both feel hot where they enter the firewall?