Question about 2006 Chevrolet Tahoe

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2006 rear heater blowes cold air - 2006 Chevrolet Tahoe

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Probably the valve has stock in one position. You need to take of console and see why it is stock and fix it if you can, or go to car service. The problem is not so big and it should not take too long to fix it.

Posted on Jan 02, 2011

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Heater valve feeding rear heater is closed not allowing water to circulate

Posted on Jan 02, 2011

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Check coolant level first, then pressure test the cap and radiator to check for leaks. if this does not work, then lift the vehicle drain some coolantout of the radiator, then locate the heater hose leading to the back core, and remove these from the easiest location to reach, then take compressed air and blow in reverse flow direction to remove any blockage. then reverse install and check.

Posted on Jan 02, 2011

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I jacked up the front of the vehicle, took the cap off of the reserve tank for the radiator, turned the car on and ran the heat (AC off) for 15 minutes. This is supposed to release any air bubbles in the coolant system and I did see air bubbles emerge as I was watching (this might be normal occurance, I'm far from a mechanical expert). Anyway, this did not immediately solve the problem, still blowing cold air as it sat there idling after 15 minutes. Dejected, I put the cap back on, lowered the vehicle and resigned myself to taking it to a dealer.

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As far as my wife knows, I fixed the problem for the price of a bottle of coolant, so I am a hero...but at first I thought it didn't work. Here we are a month later and still blowing warm air and haven't had to replace any more coolant...the internet is a wonderful thing!

Hope this works for you, and I hope I can figure out my rear heater problem as well.

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