03 Silverado 6.6 duramax 2500 4x4

Asked by Joe59_ Nov 26, 2020 at 07:47 AM

Question type: Maintenance & Repair

Lights dim and volt gauge drops and comes
back to normal, happens mostly at freeway
speeds

1 Answer
157,635

James answered 4 years ago

My first suspect would be a dying alternator. Check your battery cable connections at both ends and make sure everything is clean and tight. Check your connections at the alternator too. Hope that helps! Jim

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