changed powersteering pump changed alternator still whining sounds like alternator

Asked by Oct 12, 2017 at 09:27 PM about the 1999 Pontiac Grand Prix 2 Dr GT Coupe

Question type: Maintenance & Repair

removed belt no whining changed powersteering pump and alternator still whining sounds like new alternator also whines as did the old one.is that normal. 1999 grand prix 3800

1 Answer

72,315

It's most likely the water pump, they're prone to failure, or the idler pulley for the serpentine belt. They're made of plastic and tend to get noisy with age. HTH. -Jim

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