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Possibly because you still have an air pocket in the system because of not bleeding properly. Low coolant typically means just that. You need to bleed the air out completely before the light will go out. If the entire cooling system, not just the radiator is not full of fluid the light will continue to stay on.

Could also be the sensor on the radiator on the passenger side...

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โˆ™ 2009-05-04 15:39:32
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Q: Why does the low coolant light stay on even after adding fluid in a 1996 Olds Cutlass Supreme?
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