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

2 Answers

250,665

Not all, if it does, then the bearing might be worn out. Remove the serpentine belt and spin the pulleys by hand, see if one makes noise or is rough turning. Also a free spinning one is also needs to be replaced.

1 of 1 people found this helpful.
69,305

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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