Question about 2002 GMC Sierra

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High speed sound that sounds as though something is hitting a fan,or a main bearing that has gone

I have a 2002 duramax GMC. I was driving down the highway and this sound occured, it only lasted about 3 seconds and happened 3 times on a short hour trip, twice on the way there and once on the way back. No visual effects were noticed as a result of the sounds, all guages remained the same and no lights came on. I just had all injectors replaced, the front diff out to change a seal,all shocks changed,intermeadiate shaft replaced and an exaust leak fixed the day before. Before all this work was done I never heard this noise before ????? Any Ideas anybody. Thanks in advance

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If its a whisleing sound it is nothing more then the turbo

Posted on Dec 02, 2008

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