Which is the heater intake hose on a 2000 Chevy Astro? can't visually follow the hoses to the engine
There are 2 hoses that go thru the firewall on the passenger side. One carries hot water from the engine water jacket, to heat the core, and the other brings the water back to the radiator. Follow the hoses to see which one goes to the radiator and the other will be the heater intake. Another way to tell, with the heat on, the hotter of the 2 will be the intake.
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