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2015 Sierra 5.3 thermostat or sensor problem

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    • January 30, 2023 at 8:26 am #744361
      afvet1015
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      My 2015 Sierra 5.3 temperature gauge has been reading one (ish) line below the normal 210, I was thinking thermostat was the problem but if I sit idle it will bump up to normal which makes me believe its the sensor instead. Any takes?

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