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I have a 2004 Pontiac grand prix with 102,xxx. The car has started to make a whining noise. The noise starts as soon as the car is started (when cold) and continues even after the car is warm. What could be the cause of the noise?

Answers from the Automotive Experts

Amanda J. Pierce, MBA Amy, You could be hearing one of a few things such as; a failing alternator, a worn belt, and I suggest you take a test drive with your local technician so that the concern is explained in detail.

Audra Fordin, Owner at Great Bear Auto Shop Hi Amy, I am curious, does this problem happen at a particular speed? And where do you think the noise is coming from? Do you hear it from the engine? OR do you hear it coming from the wheels. There are a few places off hand that I can think of that will cause a "whining" noise. If it is from a wheel, a hub bearing makes that type of sound. If it is coming from the engine, it could be a belt tensioner. Does the noise get louder as you go faster? When you are driving, try to pinpoint where you hear it most and and give this information to your technician, it will help them find the problem quicker. Thanks for reaching out. Audra

Pat Fleischmann, Director of First Impressions at Community Tire Pros & Auto Repair The Belt would be my first guess without looking at it or hearing first hand. Other items it could be would be the fan motor or possibly the transmission. Try and locate the general area where the noise is coming from and get it to a competent repair shop. The more information you can give them will be helpful....

Suzanne Grego, Technician at City of Philadelphia Fleet Management Amy, My first guess at a whining noise, without hearing it, would be the serpentine belt. It can whine or sqeal from moisture getting on it (a leak of some sort), from a bad pulley, or just because it's old and needs to be changed. If the noise is not coming from the belt, my second guess would be the power steering pump. Hope this gets you headed in the right direction. Suzanne

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