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Another noise from the 2009 Chevy Silverado

Another noise from the 2009 Chevy Silverado

Postby tumbleintherough [OP] » Aug 17 2011, 9:23am

I have a 2009 Chevy Silverado regular cab work truck with 36,002 miles on it. About 20-30 seconds after I start my truck, I notice a loud noise coming from the passenger side of the engine bay. It sounds like an extra fan is turned on. And if you've ever had too many programs running at the same time on a desktop computer, you'll hear a noise similar to what I'm describing. It doesn't affect the performance of my truck and the "check engine" light doesn't come on. Also, the temperature does not go above 210 at any time and the engine coolant is at the right level. Thanks in advance for your help.
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Re: Another noise from the 2009 Chevy Silverado

Postby lzn197 » Aug 17 2011, 12:42pm

It could be either your ABS module or your stand alone vacuum pump for your power brakes or an emission, air pump. Those systems will run a quick test of components after each key cycle. I hope this helps.
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Re: Another noise from the 2009 Chevy Silverado

Postby tumbleintherough [OP] » Aug 19 2011, 10:27am

Thanks for the reply, Gordon! I'll likely have my truck looked at next week and see what's going on.
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Extra Info: 1500 Work Truck
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