The car gets warm temp gauge just doesnt move and the low coolant. The low oil light comes on frequently and I get it checked and it needs oil 2 weeks after an oil change. 6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance I have a 2000 chevy impala and it takes a long time to warm up and the temp gauge doesnt move, and low coolant light comes on frequently and I put coolant in it. I don't know, but depleted Dexcool may also cause issues with the sensor (specific gravity changes), so maybe it's time for a coolant system service, if the mix is otherwise correct. That doesn't mean the system had less than 25%, but if you add water to the tank, you are diluting the mixture, and may cross that line. Less than about 25% Dexcool didn't show a level. What can or should I do to correct this problem Any ideas. I got the 'Check Low Coolant' light on - checked coolant - no problem was right where it should be. I did some testing with the sensor using a scan tool to read the PCM coolant level indicator (on/off). 2000 chevy impala: Check Low Coolant light on - checked coolant Customer Question. Anyway, after the head gasket replacement and a fill with 50/50 Dexcool the sensor and engine was happy. Turns out, the system had no Dexcool in it (water only, and I suspect the head gasket failure was related), and the sensor never saw the level. He did, but the low coolant indicator didn't stop. An independent shop and the Chevy dealer both told the owner the sensor was bad, and the tank needed replacement. I ran across this while doing head gaskets on a 2001 Malibu about a month ago. The density of water is considerably different than Dexcool. If you've added water to the tank recently, it may not sense the level correctly, and give the false indication of a failure.
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