2001 Chevy Tahoe heater core connection broke a few months back change them out heater blowing lukewarm air someone told to flush heater?

Question

Humveetech · Answer

Air pockets like Jethro said.  Flushing out usually fixes nothing, if it is a restriction usually means heater core replacement

J E T H R O · Answer

Could have and air bubble in it or it may need a thermostat, Your temp gauge should be up near 200* too have a hot heater.

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