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Whirring fuel pump

kc5deb

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kc5deb Enthusiast

kc5deb

Posted
Posted

My 2002 GMC is making a whirring sound; kind of like the sound a high speed electric motor makes.

 

It used to only do it after a long hard trip, but, now it seems to do it all the time.

 

I can turn on the ignition, and it whirs, then stops, but, as soon as you start it, the whirring comes back.

 

Is it normal to have such a loud fuel pump, or does it mean it's about to crap out on me?

Trouttrooper Enthusiast

Trouttrooper

Posted
Posted

I wouldn't say we had a lot, but a fair number of our fleet trucks have the whining fuel pump syndrome. Never have had any really fail. My '02 work truck started whining after about 10,000 miles. Just keep an eye (or ear I suppose) on the sound. If it makes a drastic change all of the sudden then you've probably got problems.

 

Change the fuel filter like suggested. The one time mine did temporary fail was when I unknowingly sucked up some crap from the bottom of the tank I got fuel at. It was 95 degrees, had 1/4 tank of gas, and I was driving slow on dirt roads with the AC on. Truck would sputter and die and wouldn't start unless I sat for 5 minutes. Then it would start and I'd be able to go another 5 miles or so and it would die again. I think what happened was the pump was working overtime with the filter being plugged and not much fuel in the tank around the pump itself to keep it cool. Changed the filter and it ran fine for another 25,000 miles before I turned it in at 75,000.

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