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My battery gauge started running around 19 all.

Tiny
ANONYMOUS
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 190,000 MILES
My battery gauge started running around 19 all the way in the red. My alternator was bought new in november 2011. After I turned truck off for about 20 minutes it went back to around 14 to 15. What could the problem be.
Sunday, February 3rd, 2013 AT 2:34 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
It sounds like a bad voltage regulator. Have the alternator tested at a local parts store. Most can do it on the car and do it for free. If it continues to do that, it will burn up wiring and damage things.
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Sunday, February 3rd, 2013 AT 3:10 AM

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