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2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900

Whine through stock radio

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Old Jan 8, 2014 | 5:18 PM
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Default Whine through stock radio

Hey all, on the AM side of my 1989 scottsdale 's stock radio. I get a harsh rpm related whine. Is there a diode or such that is failing or was this par for the course on the delco units? Thanks!
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Old Jan 12, 2014 | 10:21 PM
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That is an audio tachometer More likely it is the rfi suppressor on the alternator. A little condenser mounted on the back of the alternator.
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Old Jan 23, 2014 | 1:53 PM
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thank you
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Old Jan 23, 2014 | 9:10 PM
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Did that fix it? If not, check plugs and make sure they are resistor also could be wrong plug wires.
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