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Old 10-20-2008, 07:20 PM   #6 (permalink)
some_other_dave
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With a 2002 GM vehicle, the voltage regulator is almost certainly built into the alternator. When you had the alternator checked, it most likely checked the VR as well, as they are one unit.

Having old spark plugs and plug wires should not affect the charging system appreciably.

I would still suspect electrical connections first, then the belt.

-soD
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