Question about 2005 Chevrolet Silverado

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Tachometer stuck on 4000 rpm

Voltmeter also stays pegged all the way past 19 volts. brand new alternator.

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Check your voltage with an ohm meter, or voltmeter while the truck is running to make sure you have proper voltage. It should read around 13 to 14 volts, any higher than that you have a defective voltage regulator internaly in your alternator. If that is ok, then check your fuses and fusable links in your main fuse panel.
Good luck!

Posted on Dec 17, 2008

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