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GMC Envoy Questions: Ask the People Who Own One

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2002 GMC Envoy Questions

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  2 responses   Voltage drops
2002 - 2009 GMC Envoy

I'm having a problem with the voltage dropping suddenly while driving at highway speed. It never seems to do it while driving at lower speeds. The headlights dim a little and I look at the voltage meter and it drops to 12 volts (from the 14volt norm). It goes back...
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