High pitched whine coming from engine

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by graham94, Nov 23, 2012.

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  1. graham94

    graham94 New Member

    I have a 2005 Silverado extended cab 4x4 with 5.3 motor. It has a high pitched whining noise coming from under the hood when I accelerate. Sort of like an air leak but it's more noticeable when the engine is cold. Any ideas would be appreciated.
  2. a.graham52

    a.graham52 New Member 100 Posts

    remove the accessory drive belt from the engine and start it up. noise gone? if not then remove the a/c belt from the engine. noise gone? this will tell you if its engine related or accessory related.

    before you even do that, spray water on the belt while its running. JUST ENOUGH water to get on the belt. noise changes/goes away then try a new belt. while the belts off, check all the pullies for dirt, spin everything you can and listen for noise/roughness.

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