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  1. [SOLVED] Odd humming noise/shimmy?

    OEM Issues
    I'm hoping I can pick the brain of some of the experts here. I'll start by saying I'm far from a car expert, but I can usually tell when something isn't acting the way it should. It's a 2004 Trailblazer with the 4.2L I-6. A humming/gutteral sound started at high (50+ mph) speeds on the highway...