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2001 GMC Sierra 1500 Question: 2001gmc 5.3 engine with 130000 mile antifreeze leak



, Anchorage, AK, November 13, 2012, 17:41

replaced water pump, flushed coolant system, new coolant. coolant level will stay up and then drop for no reason. mechanic tested coolant, head gasket. nothing found. now water or coolant in oil.

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