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In December, 82k miles,I turned engine off and fan ran on high for over 5 minutes. From reading about the lgx I knew it was probably the thermostat. Got AC Delco from Rock Auto $80. Watched videos on YouTube, nobody did it exactly the same. I'm not the best mechanic, but didn't have any problems. Draining the radiator kept coolant out of the valley. You have to take the intake manifold off on the V6 so I saw the intake valves. They had a fair amount of carbon on them. With the manifold off I took all the insulation of the valve covers so spark plug change will be easier and looks better. Can tell no difference in noise. Only failure I've had, got it new. ❤️ The car
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