Question about 2004 GMC Yukon

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Clock goes back to 12 every time it is started back up. Needle on battery meter fluctuates while in idle.

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  • GMC Master
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It's mean that the battery current to radio when to 0volt.
find out battery or alternator problems like battery voltage. a load test . or alternator is charging
hope it helps

Posted on Mar 20, 2014

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SOURCE: 2004 GMC Envoy SLT possible electrical problems

it sounds like you need a regulator for your alternater it is reversing polarity there for draining your battery and reseting the clock. it is located on the back of your alternator.hope this could help.

Posted on Jan 08, 2009

  • 4340 Answers

SOURCE: my 99 safari volt meter always stays on about 14

Not necessarily a problem. It depends on MANY things. If you are running lights, heater or AC, brake lights, all of these things can cause what you describe.

At speed (2,000 rpm or so), you need to be 14 volts or higher.

To test:

Fully charge, then load test battery.
If Battery okay, then load test the alternator to check output amps. If no tester is available, often parts stores will test for free.


Posted on Jul 28, 2010

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