2004 Chevrolet Tahoe 2WD with 250K miles. No heat anywhere in tahoe on any setting! Thermostat reads good temperature. Even after driving for an hour, it still blows cold(outside air temp). Plenty of coolant in reservoir, no unusual noises, etc. Any ideas would be appreciated. IT’S COLD IN THE AM!!!
The problem could be with the blend door actuator, which determines whether cold or hot air comes out the vents,
https://www.rockauto.com/en/moreinfo.php?pk=8625852&cc=1424236&jsn=465
Or the climate control module.
http://www.cardone.com/Products/Product-Detail?productId=4C1000&p=rock&jsn=482
The hard part is, which one?
Tester
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Check your heater hoses
Both of them should be hot once the engine has reached proper operating temperature
If only one of them is hot, your heater core is partially plugged
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Posible stupid question, is your blower motor working?
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