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Is battery or altenator faulty if battery light on and voltmeter at 1/4th dial?

(1997 GMC 3500 Pickup)
in Rockford, IL on April 27, 2011
warning light went on and meter indicated discharge when I started ignition.
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Popular Answer
on April 27, 2011
I wouldn't pay too much attention to the voltmeter, but a battery light indicates a charging system failure.

Make sure the battery is fully charged and then test the charging system. Chances are the alternator has failed.
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