what is labor hours to replace heater core 1999 astro van

What is your question?

had water pump replaced and thermostat still getting hot now being told it could be heater core. had a lot of rust. could it be radiator? also had lower radiator hose replaced belt tenronor, serpentine belt replaced

What makes this problem better or worse?

driving half mile gets hot

How long has your 1999 Chevrolet Astro had this problem?

2 days