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2011 Chevy Malibu LTZ 3.6l V6
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So my father replace the thermostat, water pump and new cooling fans and when ever I drive with the ac on the temp guage stays normal but when ever I stop for a long time it goes right over half then goes back down when driving. Some time the gauge moves up and goes back to normal right after. Does anyone know what to replace to make it stay still??
 

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2011 Malibu LTZ 3.6L V6 Red Jewel Tintcoat
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18,234 Posts
It sounds a lot like the radiator fans don't turn on or are running at low speed. There are 3 relays that control them in the underhood fusebox. There is also a sensor for ECT between the engine and radiator that may have failed or its wiring may have been compromised.

Have you had the car scanned for any trouble codes?
 
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