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No heat on S10 pickup on 1991 Chevrolet S10

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Heater coil has been replaced as well as heater hoses and radiator fan runs but blows cold air
(3) Answers
if you replace the heater core already check the heater core hoses if its get hot or not maybe blocked, maybe just not working/hoses wrong connections, is your temp normal? is your thermostat new?
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