do all the alternators whine or is it the alternator

Asked by Feb 18, 2017 at 03:36 PM about the 1999 Pontiac Grand Prix

Question type: Maintenance & Repair

car whines sounds like power steering pump changed it but still whines.nothing left but alternator

1 Answer


Could be normal. When under heavy load (headlights, rear defogger, blower on high, etc.) some alternators will whine. Not super loud, but audible. Most of my GMs have done this. If it's loud though, then it's the bearings inside of the alternator. HTH. -Jim

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