It wil overheat setting still or driving it. It is actually a Yukon, not a Tahoe. It is my mother in laws vehicle. I believe it has the 5.3 V8. No visible leaks anywhere.
I have replaced the water pump, and t-stat, and it is still overheating. I have to add antifreeze and water to it every week. Anyone have any ideas what I need to do or possibly what it might be?
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