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cooling system

  1. Turbo/Engine noise

    06-07 LBZ & LLY Duramax Powertrain
    I have just replaced my CP3 pump and all seems to be fine except I have a new noise that has developed. When I put the engine under a load (like going up a good hill or hammering on it) I can hear a distinct whine. It is not normal turbo whine it sounds more like a powersteering pump low on...