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2014 chevy Silverado loud engine noise when first starting up


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Just purchased certified 2014 Silverado loud engine noise sounds like some kind of pump when first starting engine

 

Today, 11:01 PM

Is it like a "rasp" noise for just a second upon startup up?

 

If so GM says that's normal; it's air that had entered the oil pump from normal drain back.

 

They say that's normal, and won't hurt anything, but we shall see in the long run if people start having oil pump isues, hopefully all will be fine, fingers crossed.

 

http://sandyblogs.com/techlink/?p=3134

 

http://www.gm-trucks...rt-noise/page-2

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