2003 suburban - squeal/whistling sound at about 2000 rpm

Discussion in 'GM Powertrain' started by jimweee, Apr 7, 2010.

  1. jimweee

    jimweee New Member

    Under light acceleration you can hear a fairly quiet whistle kind of noise from under the hood. I just bought the truck and he said it has been doing it for awhile. It sounds like air being released from a valve. Like maybe the egr or something. Any ideas. I searched and didnt get any matches..


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