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Buick Rainier on 2004 Buick Rainier

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my 2004 Buick Rainier reads coolant hot, but its not over heating my guages don't read overheating and my check engine light is not on what else could it be
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(2) Comments
The temperature gauge may not be "exact'; I would recommend having the gauge checked with a diagnostic tool to see if it responds to commands properly.

I would also verify the temperature sending unit was reading properly at the engine.
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Are you sure the overheat light is not a low coolant light? It is not unusual for the low coolant light to be on and the coolant is full. it does indicate a problem, though