Question about 2001 GMC Sonoma Extended Cab
Hi, this problem is usually caused by a fluctuation in the voltage supplied to the instrument cluster. I recommend you test your alternator. If you have a voltmeter, check the voltage at the battery with the engine running. It should not fluctuate and should be at least 14 volts. If you don't have a voltmeter, take the alternator off and have it tested at your local parts chain.
Posted on Apr 01, 2011
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Posted on Jan 02, 2017
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