Question about 2003 GMC Envoy
Posted by Anonymous on
Hows the water flow through the radiator? maybe there are some plugged tubes in it. The impellers on the water pump may have eroded down so the volume of water the pump circulates isn't enough. Look in the radiator with the cap off and the engine running. If bubbles are present one of the heads is warped allowing compression gases from a cylinder to enter the radiator.
Posted on Jul 24, 2016
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Posted on Jan 02, 2017
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