Mechanics

CHEVROLET TAHOE ALTERNATOR PROBLEM

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.
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February 3, 2013.



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.