Voltage too high for power inverter

Tiny
SCLEM
  • MEMBER
  • 2009 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 27,000 MILES
Vehicle voltage at 15 volt which is destroying my power inverter. GM will address the problem because of the computer system.
Wednesday, February 17th, 2010 AT 11:51 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

High voltage output caused by a faulty voltage regulator in the alternator.
Test the alternator and verify the output that you are seeing on the gauge.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

If the voltage is high the alternator needs to be replaced.

https://www.2carpros.com/articles/how-to-replace-an-alternator

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
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Monday, October 11th, 2021 AT 8:51 PM

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