I have a 2010 Chevrolet Silverado that I purchased in June 2010. About 3 weeks ago I started to notice a low whining noise in the cab while when coming to a stop at lights and in traffic. The noise is louder now and sounds like a whistle or whine. It only happens while in Drive and in Idle and at low speed when coming to a stop.
I opened the hood and had a friend keep it in drive and it sounds like it could be coming from the alternator.
I took it to the dealer and the master mechanic said that it could possibly be coming from the alternator but he could not do anything about it. He made some excuse that I could test drive some of the newer vehicles and some of them would have the same sound. He said that the software from GM may be the problem, but he couldn't do anything.
My wife has a Tahoe, my brother inlaw has an avalanche, I have another friend with a Tahoe and he has a 2008 silverado. None of them make the noise.
The noise is very annoying. Does anyone have an idea if it is the alternator? The forums I have read, alternator noise usually increase as RPM's increase, but that is not the case with mine. And the truck is only 5 months old, so I don't think that the alternator is dyning...but I am open to anything.
Edited by michaelgibbs777, 12 December 2010 - 06:27 PM.