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  1. Chevy Silverado Forum (GMC Sierra)
    I've got a 2012 Silverado. 5.3 1500 z71 4x4, active fuel management delete, cab and a half, short bed, and factory suspension and exhaust if it matters. I bought it used at 130k miles so I don't know it's full history, just that it's a rebuilt title. I've got an intermittent vibration, almost...
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