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Q:

heater not working.
on 2004 Chevrolet Avalanche 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
heater not working already replace thermostat. coolant has to be replenish every other day no leaks and no water in oil.
(2) Answers
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I agree with Roy. You have coolant going somewhere. If the coolant level drops it creates an air pocket and can stop circulating to the heater core, causing the loss of heat. We would be happy to look at it for you. www.fenskiauto.com

Matt
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