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Old 12-19-2011, 06:22 PM
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Scoooter Scoooter is offline
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The only other thing I can think of since you flushed the system would be an air lock. There might be a bubble of air in the system preventing it from flowing correctly. I've had this happen as well and was a pain in the butt. Basically I sat and squeezed hoses for about an hour till it worked it's way out. If you have a top fill raditor you should be able to remove the cap and see fluid flowing by the hole after the truck warms up (I could see it on my truck, not sure about yours). That would show the thermostate is open and cooling the engine correctly which in turn should produce heat for your heater.
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