Buick Repair Questions? Ask a Mechanic for Answers ASAP
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The fault with the low coolant light on all the time wont cause the stall out but the warning light can be due to an internal electrical fault in the coolant level sensor which is usually located in the radiator itself.I have had to replace this sensor before for this issue here.I would have this tested to be sure it needs replaced.
The stall out when warmed up can commonly be caused by a failing crank position sensor,this sensor is seated at the front crank pulley/harmonic balancer and heats up with the engine.Then when it is weak it causes the engine to stall out like this when hot and the vehicle usually has to sit a period of time before it will restart but will usually act up again.
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