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Showing results for tags 'reservoir'.
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99 Silverado with 220k miles with low coolant light turning on after 30mins drive typically. First tried cleaning reservoir because the sensor is built in, but did not help. Then bought new reservoir that includes sensor and that didn't help either. The reservoir is correctly filled to FULL mark and always is. Oil change just done by me and isn't milky so there's no coolant mixing in. Last coolant flush was at 170k with the pink stuff so I'm good there too. Is there another sensor n the radiator maybe? Or could this just be a grounding issue? Thanks for any advice.