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Sounds like the Diode or the Voltage Regulator is going out on the alternator. I would recomend replacing soon. When one of those 2 componets go out, it really over heats the alternator. This causes the bearings on the back side of the alternator to fail, and sieze. This has cause some fires in GM cars and trucks.

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16y ago
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Q: Why is your voltage warning light flickering -- and does it have anything to do with your 1986 Pontiac 6000 stalling once in a while only 65000 km on it?
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